Prof Neil Wyn Evans v Cambridge University 2024

Estimated reading time at 200 wpm: 31 minutes

The thirty-year pattern this case belongs to

This judgment handed down in June 2026 belongs to a pattern the reader will recognise, and which the Claimant himself identified. Writing to the Registrary in August 2023, he drew a comparison with the Chester Hospital Trust: “The circumstances are all very familiar. The Whistleblowers were threatened with disciplinary action. There were two external reviews that whitewashed any wrongdoing.” [para 376] In his evidence he went further, invoking the Post Office scandal and the observation that senior management may be “led by the nose by its own middle management & in-house and external legal advisors.” [para 411]

The Tribunal reached for the same kind of conclusion, in more careful language. It found no conspiracy, but “a shared desire to close down whistleblowing complaints” which might damage the University and its Institute of Astronomy. [para 905] That finding — harm without a directing mind — is the subject of this account. Click declaration (3 dots)

One whistleblower, and the cost of speaking up

Professor Neil Wyn Evans is Professor of Astrophysics at the University of Cambridge’s Institute of Astronomy, employed there since 2002. [para 60] In July 2021 he wrote to the Head of School that he was “very concerned” about Dr Gudrun Pebody, an EC Contracts Manager, and feared she was in a fragile state of mind. [para 139] Two days after he wrote to Professor Richard McMahon asking him to stand down pending an investigation, Professor McMahon filed a Dignity at Work grievance against him and two colleagues. [para 215], [para 243] The HR Director later described that grievance, in an internal email, as a “counter-complaint.” [para 305]

The cost was measured in years: an investigation that ran for almost two years, sickness absence, and a long series of complaints that went unanswered. [para 847] The Tribunal’s answer, delivered unanimously, was that the Claimant was subjected to detriments for having made protected disclosures, contrary to s.47B of the Employment Rights Act 1996. [para 1]

What this account will and will not do

This is a close account of the judgment, not a re-run of the hearing. It will set out what was decided: which disclosures qualified for protection, which detriments were upheld and which failed, and why. Eleven complaints succeeded; three were dismissed. [para 2], [para 3] That discrimination is part of the Tribunal’s authority, and it is kept in view throughout. Where the judgment declines to find more than the evidence supports, this account declines with it.

1. The scene

The Institute, the principals, and the loss of trust

The Claimant, Professor Neil Wyn Evans, is Professor of Astrophysics at the University of Cambridge’s Institute of Astronomy. His employment began on 1 October 2002, and he had previously served as Deputy Director and Acting Director of the Institute [para 60]. Until the events giving rise to the claim he had never made a grievance complaint, nor alleged that he was making a whistleblowing disclosure [para 61].

He and Professor Richard McMahon had known each other since they were students in the 1980s, had worked together for many years, and each had considerable respect for the other’s work. The Claimant at times described Professor McMahon as “a brother in astronomy”; even while naming him as a Respondent, he described him also as a victim in the matter, on the basis of what he said was the mishandling of the case by the University’s HR Department [para 62]. Professor McMahon was appointed Director of the Institute in 2017, for a five-year term [para 63].

The relationship that mattered to the claim turned on the succession planning for Gaia, a European Space Agency mission for which the University held grants, and whose Principal Investigator (“PI”) role — akin in the Tribunal’s view to a project manager — was held by Professor Gerry Gilmore [para 64]. Professor McMahon did not want to give Professor Gilmore a second extension to work beyond retirement, and asked the Claimant and Professor Vasily Belokurov to help negotiate a date for handover to Dr Walton, whom he favoured [para 65]. Tensions between Professor Gilmore and Professor McMahon had already made agreement impossible [para 66].

In October 2020 the Claimant and Professor Belokurov reached an agreed handover date with Professor Gilmore. When this was presented to Professor McMahon, he rejected it and imposed his own. Professor Belokurov described this as Professor McMahon “moving the goal posts” [para 67]. The Claimant was left with the impression that Professor McMahon’s treatment of Professor Gilmore was harsh and humiliating, and that he had caused the Claimant and Professor Belokurov to mislead Professor Gilmore in their discussions [para 68]. From this the Claimant formed the view that Professor McMahon had been unreliable and less than straightforward, appeared to favour some colleagues while punishing those he disliked, and he began to question Professor McMahon’s decision-making. It marked a turning point: the Claimant lost trust in Professor McMahon as Director, although the latter appeared unaware and continued to speak to him candidly, as the covert recordings that followed would capture [para 69].

The covert recordings and why they mattered

Some of the documentary evidence before the Tribunal consisted of transcripts of covert recordings made at work by the Claimant [para 44]. The Tribunal accepted that higher courts have on occasion found covert recording to be a distasteful thing to do, but recognised that in some instances it may be the only way evidence of potentially unlawful behaviour can come to light. The Claimant said he made the recordings for various reasons, including his own protection. Because several of the Respondents’ witnesses struggled to remember details due to the passage of time, the transcripts were of assistance in fact-finding, “and without them our findings may have been very different.” The Tribunal nonetheless made clear it did not encourage the practice [para 45]. The test for admission — relevance and necessity for the fair disposal of proceedings — was clearly met, and the Respondents made no attempt to exclude them [para 46].

The Claimant’s reasons were twofold: he did not want to be placed in a position where Professor McMahon told him something and later denied it, as in the Professor Gilmore retirement issue; and he recorded for his protection in case Professor McMahon sought to exact revenge. The Tribunal accepted that this was how he genuinely felt, finding him an honest, consistent and reliable witness with a precise recall of facts [para 70]. It also accepted part of the rationale on the strength of Professor McMahon’s own manner of giving evidence, which involved going back and forth from agreeing to disagreeing, frequently changing his mind, and appearing likely to be perceived by others as chaotic in approach [para 71]. The Tribunal accepted that one reason for the recordings was that the Claimant genuinely believed Professor McMahon would change his mind and go back on things they had agreed, and that a record would be needed [para 72].

The recordings were not treated as the product of manipulation. Nowhere within the transcripts did it appear that the Claimant was manipulating the person being recorded in order to get them to say things; they appeared to show members of staff freely discussing matters without any element of coercion or manipulation by the Claimant [para 95].

2. The disclosure

Dr Pebody, the ORP grant, and the letter sent in error

Dr Gudrun Pebody worked at the Institute of Astronomy as an EC Contracts Manager, responsible for managing international funding arrangements. Ninety per cent of her work was funded by the ORP grant from the European Union; the remaining ten per cent was funded by the Institute for her work on examinations [para 79].

The ORP is a large astronomical project funded by the European Commission, bringing together thirty-seven academic institutions. The grant proposal was submitted on 16 October 2020, and the Institute signed a Declaration of Honour on 14 December 2020, committing the University to accept the contract when ready [para 73]. The funding itself was underwritten by the funder from 1 March 2021 [para 75]. All that then remained was for Professor McMahon, as Director, to complete an administrative X5 form to accept the grant funds [para 108].

That step did not come. At a covertly recorded meeting on 7 June 2021, Professor McMahon said he wanted to “zero out” the Opticon project because it was “not a research project” but “an administration project”, and warned that if Dr Pebody “was not careful there would be a disciplinary” [para 97]. The Tribunal found that the natural meaning of “zero out” was to cancel or terminate the project, and that this was what he meant at the time [para 98]. Cancelling the project would inevitably have affected Dr Pebody’s employment, given that 90 per cent of her work was spent on it [para 99].

On 22 June 2021 Dr Pebody received an email with the subject line “Invitation to consultation meeting with regard to the end of your open ended contract” [para 104]. The letter said her funding was due to cease on 30 September 2021 and offered help “in finding a new position” [para 105]. The Tribunal found the letter was sent in error, because the funding had been in place since 1 March 2021 and all that was required was Professor McMahon’s completion of the X5 form [para 108]. No criticism was made of the administrator who sent it, who had been under the impression the funds were not in place; the letter came about through Professor McMahon’s inaction [para 109]. For Dr Pebody, already distressed at work, the letter exacerbated her state [para 107].

The disclosures of July and August 2021

Matters came to a head over the weekend of 17 and 18 July 2021, when Dr Pebody became more distressed and was emailing the Claimant repeatedly; he observed her crying uncontrollably and close to breaking point [para 134]. He first approached Professor Clarke, the Institute’s Wellbeing Advocate, who directed him to Professor Peake as Head of School [para 137]. On 20 July 2021 he emailed Professor Peake that he was “very concerned” about Dr Pebody, that she was “in a fragile state of mind”, and that there was “overwhelming evidence that the Director is planning to make her unemployed, as part of a personal vendetta” [para 139]. The following day, having received an out-of-office reply, he forwarded the email to Ms Birrell in HR [para 150].

On 26 July 2021 the Claimant circulated the “Delays Document”, setting out that Professor McMahon had held up the ORP grant for over thirty-seven weeks, that his proposed changes were an overreach of his powers, and that the end-of-contract letter had been sent to Dr Pebody while funding was in place [para 161]. He shared it with the Deputy Directors and Ms Macharia, and discussed his concerns in meetings with Professor Peake and the Deputy Directors [para 174], [para 176], [para 177], [para 198]. On 2 August 2021, asked for a transcript of his recordings, he supplied the “Behaviours Document”, reproducing the relevant passages and alleging “overwhelming evidence of bullying of a very serious kind” that had “drove its victim right to the edge of self-harm” [para 278], [para 280].

The Tribunal found that the first seven disclosures each qualified for protection. The 20 July email was a protected disclosure under s.43B(1)(b) and (d) [para 639]; so too the 21 July forward [para 646], the Delays Document under s.43B(1)(b) [para 674], the meeting with Professor Peake [para 696], the meeting with the Deputy Directors [para 716], and the Behaviours Document [para 731]. By contrast, the eighth alleged disclosure — the 12 December 2023 grievance — was held not to be a qualifying disclosure, resting on “inference, suspicion and disagreement with decisions that had already been taken” [para 736], [para 739].

3. The retaliation

The grievance of 29 July 2021

The ORP grant was signed off just before midday on 29 July 2021. Just after 4:15pm that afternoon, Professor McMahon raised a Dignity at Work grievance with Professor Peake against Professor Gilmore, Professor Haehnelt and the Claimant [para 243]. It came two days after the Claimant’s email asking Professor McMahon to stand down pending a full investigation, an email the Tribunal found Professor McMahon had understood [para 215], [para 232].

Against the Claimant, Professor McMahon alleged “bullying behaviour towards me over the acceptance of the Opticon-Radionet-Pilot grant and other false, unsubstantiated accusations which they proposed to share with all members of the academic staff in an attempt to bully and humiliate me” [para 246]. He also alleged that the Claimant and Professor Haehnelt had “failed to request that the Department underwrite Pebody’s contract and instead used the stress and anxiety caused to Pebody to claim that I had behaved inappropriately” [para 246]. One further allegation was directed at the Claimant alone: that he had sent disrespectful emails to the support team, an historic matter from around three years earlier which did not relate to Professor McMahon and which the Claimant had denied at the time [para 247].

Several features of the grievance troubled the Tribunal. The complaint that the Claimant had failed to request underwriting made no sense, since the Claimant was not the PI on the grant and had in fact requested precisely that in the Delays Document; Professor McMahon also knew funds had been in place since 1 March 2021, so underwriting was not required [para 253]. And the central charge — that the Claimant had made “false and unsubstantiated accusations” — was never particularised. The Tribunal observed that by the final hearing, five years later, Professor McMahon had still never explained what those accusations were [para 269], [para 784].

The Tribunal rejected Professor McMahon’s account that he had not known of the disclosures when he filed. It found he was well aware of the contents of the Claimant’s 20 July 2021 email even if the document itself had not been shared with him, because the contents had been discussed in the meetings of 27 July 2021 [para 257]. Ms Akroyd’s own evidence placed the proposed circulation of the Delays Document as the trigger for the grievance, while recognising that its contents were a factor [para 258]. On causation the Tribunal held that the manner of circulation was part of the reason, but the contents of the protected disclosures were “a large part of the reason why Professor McMahon filed his grievance” [para 790].

The delay in notifying the Claimant was itself extraordinary: he was not told of the grievance until 3 September 2021, and did not receive the text until 19 October 2021, some 115 days after filing [para 260].

The breaches of confidentiality and the defamation claim

The Dignity at Work Policy requires that confidentiality be “very strictly respected” and that any breach may result in disciplinary action [para 270]. Within moments of filing, Professor McMahon breached it three times.

He told Professor Reynolds, his line manager, that he had filed the grievance, saying he had “played a very very long game”; Professor Reynolds replied “Good!” [para 271]. Minutes later he emailed Dr Walton, describing the Claimant and Professor Haehnelt as “amateurs” [para 272]. The following day he shared a copy of the grievance with Ms Macharia [para 273]. At no point did he ask any of the three to treat the information as confidential [para 275]. Professor McMahon’s justification — that the Claimant had discussed the situation and later signed a letter of no confidence — was rejected as an ex post facto attempt to explain matters that had not yet happened [para 277]. No action was ever taken on the breaches; when the Claimant raised them, they were ignored, in particular by Professor Harper and Professor Flewitt [para 277].

The grievance also generated litigation. On 26 July 2022, in view of the impending limitation period, the Claimant instructed solicitors to lodge defamation proceedings in the High Court against Professor McMahon regarding the contents of the grievance [para 304]. At a preliminary hearing on 24 April 2023, Mr Justice Linden identified two defamatory imputations: first, that the Claimant and Professor Haehnelt had proposed to share allegations they knew to be false; second, that they had chosen not to request underwriting and instead “used the stress and anxiety which her situation caused her for their own purposes” [para 324]. Professor McMahon conceded the first was defamatory; Mr Justice Linden found the second defamatory too [para 325].

At mediation on 15 November 2023, Professor McMahon conceded that the allegations against the Claimant were untrue and undertook not to repeat them, recorded in a Tomlin Order accepted as part of the High Court judgment of 2 January 2024. The bullying allegations were withdrawn [para 326]. No action was taken against Professor McMahon by the University following that concession [para 326]. In his evidence Professor McMahon said he did not agree with the judge’s view and that the University would make its own decision [para 328].

4. The institution’s response

Ghost writing and abrogated decision-making

The Tribunal’s most persistent difficulty was not what the University decided, but that it was often impossible to tell who had decided anything. It was “not always clear who had been responsible for the detriments; who had been the real decision-makers; and how decisions had been reached” [para 5]. In many instances decisions were “presented to decision-makers as a fait accompli without any genuine or meaningful inquiry into how the decision had been reached”, which they then put their names to [para 5]. Pre-determined outcomes “appeared to have been rubber-stamped, and little if any paper-trails were put before us showing the thought process behind the decision-making” [para 6]. “Ghost writing was a consistent and a concerning theme throughout this matter” [para 6].

The pattern was concrete and repeated. Correspondence sent in the name of Professor Glover as Responsible Person was in reality drafted by HR, in particular by Ms Hudson, “which Professor Glover simply put her name to” [para 293]. Professor Munir’s outcome letters were written by HR and merely put into his name; he “displayed no evidence of actually having played any part in this decision” [para 489]. The response Professor Prentice signed to the insurance grievance “was written solely by Ms Rampton and then presented to the Vice Chancellor as a fait accompli. Professor Prentice had very little to do with it, save for putting her name to it” [para 443]. The Tribunal saw the same method in Professor Munir’s drafting by Akroyd and Gardner [para 389], and again where Professor Prentice put her name to a letter written by an unidentified author [para 491], [para 495].

The Tribunal drew a line between legitimate drafting and this. Letters and decisions are often drafted with input from HR and lawyers, but “it remains the role of advisers to provide advice and for decision makers to be the one who makes the decision” [para 754]. What it expected was “a decision being reached first then help being provided to draft it”, not the reverse [para 755]. What it found was that “in some instances there was no evidence at all of independent thought by the decision maker” before the draft arrived, and no example of a decision-maker querying what they were asked to approve. “It appeared to the Tribunal that in some instances HR had overstepped the boundary between advising and deciding, and that some of the decision makers had abrogated their decision making” [para 756].

That mattered for a reason beyond process. “This is an incredibly unfair way to reach decisions because the complainant will not be able to identify who made the decision, but more than that, they may not be able to understand how that decision was reached” [para 757]. Where the same adviser moved across multiple stages and overstepped their role, it “opens the door to considering whether there has been any sort of organisational enmity within HR or the Registrary” [para 757]. In the absence of a clear paper trail, the Tribunal said, questions inevitably arise “about how and why a decision was reached” [para 758].

Deflection, delay, and the wall of silence

Around that machinery the Tribunal found a consistent tone. The handling of the matters was “beset by repeated delay and progress was fitful with little if any oversight” [para 8]. The Claimant was not told of Professor McMahon’s grievance for over a month, and did not receive its text for 115 days [para 260]. Professor Harper’s outcome took 624 days, a level of delay the Tribunal found “staggering” [para 459]. Asked who had oversight of the process, Ms Rampton “was not the appropriate person to comment and had not been involved”; the Tribunal found the evidence “gave the impression of having been made up on the spot to protect the University” [para 399].

The outcomes themselves, when they came, refused to engage. Professor Harper’s answer on one point was “syntactically challenging” and “simply deflective without any attempt to engage with the issue — to put it another way, it was brushed under the carpet” [para 478]. His finding that there was no evidence of confidentiality breaches was reached “because no one had attempted to look into them in the first place” [para 471]. Professor Flewitt’s appeal outcome “did not even attempt to address the crux of the complaint” [para 482]. Ms Rampton’s rejection of the insurance grievance gave “the clear impression of someone looking for any reason to dismiss the complaint rather than engaging with what it was about. Put simply this was an attempt to deflect” [para 931].

Where the Claimant asked about the insurance policy he met “for the most part… a wall of silence and refusal to even acknowledge that it had been used at all” [para 435]. Professor Peake’s response was not disclosed even after separate Data Subject Access Requests; the Tribunal could not accept that so many repeated failures were inadvertent, since that “would imply a level of incompetence we are not satisfied exists within such a large and well-resourced institution” [para 381]. The Tribunal repeatedly identified “a desire not to look and to try and shut things down in order to protect the University” [para 404], and a concern “to shut things down, to bring an end to any further criticism or challenge” [para 450]. Where complaints were shut down prematurely, that was “likely to be more about minimising criticism than achieving finality” [para 452].

The difference in treatment of the two complainants

The Tribunal measured the University against itself and found the scales badly weighted. “Allegations against the Claimant were accepted and subjected to a prolonged nearly two-year investigation by the University even though they contained scant particularisation, and no evidence to support them. By contrast, a number of the Claimant’s detailed concerns or complaints were dismissed out of hand without a proper process” [para 7].

The contrast was sharpest on informal resolution. The Dignity at Work Policy made provision for it “where appropriate”, and Professor McMahon’s grievance was allowed to bypass that stage entirely [para 267]. Yet when the Claimant raised his insurance grievance, it was rejected by Ms Rampton precisely because “he had not attempted to raise these matters informally first” [para 437]. Professor McMahon never attempted informal resolution and “it was not a bar to him pursuing his complaint”; the Claimant, who had in fact raised the matter informally and repeatedly, was penalised for allegedly not doing so [para 824]. “The difference in treatment within the same institution on comparable matters was obvious and caused us to query the motivation” [para 825].

The Tribunal described it as “a highly unusual degree of indulgence” afforded to Professor McMahon’s complaint “notwithstanding the evidential deficiencies which had become apparent” [para 823]. The same reasoning recurred when the Claimant’s later complaints were dismissed as already investigated: the assertion was “inaccurate – the investigation did not consider the issue of insurance, nor did the terms ever provide for an investigation of Professor Peake and Ms Akroyd’s specific involvement” [para 486]. The difference in how the Claimant was treated was, the Tribunal concluded, “quite stark and unjust” [para 930].

5. What the law decided

The disclosures upheld, and the one that failed

Of the eight disclosures alleged, the Tribunal upheld seven. The two statutory grounds that mattered throughout were s.43B(1)(b) — a failure to comply with a legal obligation — and s.43B(1)(d) — endangerment of health and safety [para 585]. The Claimant abandoned reliance on miscarriage of justice (s.43B(1)(c)) on the seventh day of the hearing, and on concealment (s.43B(1)(f)) in closing [para 47], [para 53], [para 732].

The 20 July 2021 email to Professor Peake was found to be a disclosure qualifying for protection under both limbs, notwithstanding that much of it was generalised: the reference to a “personal vendetta” and the detail of four named former colleagues supplied enough specificity to amount to information, not bare allegation [para 589–591], [para 639]. The Tribunal reached the same conclusion, on the same grounds, for the 21 July 2021 forward to Ms Birrell [para 646], for the meeting with Professor Peake on 26 July 2021 [para 696], for the meeting with the Deputy Directors later that day [para 716], and for the Behaviours Document of 2 August 2021 [para 731]. The Delays Document qualified under s.43B(1)(b) alone; the health and safety limb was dismissed because the document contained no information relevant to it [para 650], [para 674]. Its later forwarding to Ms Macharia carried the same finding [para 675].

One claim failed at this stage. The 12 December 2023 grievance concerning the insurance policy was held not to be a qualifying disclosure. The Tribunal accepted the Claimant held genuine concerns, but found the grievance “substantially based upon inference, suspicion and disagreement with decisions that had already been taken”, resting on speculation about what the University and Professor McMahon may have told the insurers [para 733], [para 736]. Unlike the earlier disclosures, which rested on events the Claimant had personally observed and documented, this one fell short of the threshold for reasonable belief [para 737]. The serious allegation of possible fraud was not, on the information available, objectively reasonable [para 738].

The detriments upheld

Eleven of the fourteen alleged detriments succeeded [para 2]. In chronological order, as the Tribunal addressed them:

• Detriment 3 — Professor McMahon’s submission of the 29 July 2021 complaint — against the First and Second Respondents [para 800].
• Detriment 1 — the continuation of the investigation of that complaint once it should have been recognised as a retaliatory “counter-complaint” — against the First Respondent [para 832].
• Detriment 5 — the breaches of confidentiality in sharing the grievance — against the First and Second Respondents [para 845].
• Detriment 2 — the delay in concluding the investigations — against the First Respondent [para 861].
• Detriment 4 — Professor McMahon’s failure to withdraw the complaint after the defamation findings — against the First and Second Respondents [para 871].
• Detriment 7 — the untimely handling of the 30 August 2022 grievance — against the First Respondent [para 885].
• Detriment 10 — the failure to investigate that grievance properly — against the First Respondent [para 907].
• Detriment 8 — the rejection of the 15 June 2023 complaint about the whistleblowing investigation — against the First and Third Respondents [para 924].
• Detriment 6 — the rejection of the 12 December 2023 insurance grievance — against the First, Third and Fourth Respondents [para 939].
• Detriment 12 — the refusal to address the 2 September 2024 grievance — against the First Respondent [para 948].
• Detriment 13 — the rejection of the 6 October 2024 complaint — against the First and Fourth Respondents [para 955].

The pattern of respondents is itself instructive. Professor McMahon (R2) is liable only for the detriments he personally caused; the University (R1) is liable for every upheld detriment; and the Registrary (R3) and Vice-Chancellor (R4) are liable only where their own rejections of the Claimant’s later grievances were found to be detriments.

The detriments dismissed

Three claims failed, and the Tribunal was careful to say why [para 3].

Detriment 11 — the alleged failure to hear the appeal of Professor Harper’s outcome — failed because its factual premise was wrong: an appeal was heard, and the criticisms made of Professor Flewitt’s decision did not amount to a failure to hear it [para 909–910].

Detriment 9 — the office location complaint — failed on causation. The Tribunal found poor handling and excessive delay, but was not persuaded the Claimant’s disclosures influenced either the initial decision to locate Professor McMahon nearby or the delay in moving him [para 964], [para 966], [para 971].

Detriment 14 — the insurance policy — failed at two levels. First, no detriment was established, since the Claimant had in fact succeeded in the defamation proceedings [para 974]. Secondly, causation failed: Mr Halls’ evidence, which the Tribunal accepted as honest and credible, showed the policy was engaged as a matter of standard practice, with no influence from the disclosures [para 976–977].

The Tribunal was thus not simply predisposed to the Claimant. It rejected his weakest claims for identifiable reasons — want of a factual premise, want of detriment, and want of any causative link — which is precisely what gives the eleven findings it did make their weight.

6. Why it happened

No conspiracy, but a shared mindset

The Tribunal was explicit about what it was not finding. “We make it clear that we do not find that there was any formal conspiracy against the Claimant. Nor do we find that every individual involved acted out of conscious hostility towards the Claimant for making a protected disclosure” [para 759]. That refusal was repeated later in the same terms: the pattern “was not coincidence, but it was not a formal conspiracy either” [para 905]. No finding of malice or ill intent was required, because the legal test does not demand it [para 751].

What the Tribunal found in place of conspiracy was something it located carefully. Following the disclosures from July 2021 onwards, the Claimant “became closely associated with allegations concerning the treatment of Dr Pebody, the handling of the ORP grant, and Professor McMahon’s conduct” [para 759]. Those disclosures were “potentially highly damaging” both to Professor McMahon and to the reputation of the Institute and the University [para 760]. From the outset the University did not even want to consider the matter under the Whistleblowing Policy, and “over time, an institutional mindset developed in which the Claimant came to be viewed as a source of difficulty and continuing reputational risk due to his protected disclosures which might damage the Institute and the University” [para 760].

The Tribunal was asked to consider whether this amounted to “groupthink” or organisational enmity, relying on the EAT’s decision in Moussa [para 741]. It was careful about the limits of that idea. Moussa was not a substitute for the statutory question, and organisational enmity or dislike of the worker was “nowhere near sufficient to show causation” [para 745]. The Tribunal would not treat poor administration, delay, or flawed decision-making as of themselves establishing causation [para 905]. The inference had to be earned, not assumed.

It was earned by accumulation. The Tribunal concluded, as in Moussa, that “many within the HR Department, and some of the decision makers (including the Registrary) formed a negative view of the Claimant” and that the many examples of unfairness and poor treatment “could not be simply explained by a string of unfortunate errors or incompetence, rather we find they showed the existence of an underlying negative attitude towards the Claimant which we infer was due to his whistleblowing” [para 822]. The same thread ran through the later decisions: a “shared desire to close down whistleblowing complaints which might be damaging to Cambridge University and the Institute of Astronomy”, with HR’s drafting and the Registrary’s later involvement as “a common denominator” [para 905].

The material influence of the disclosures

The statutory question was narrower than the institutional picture: whether the protected disclosures were “a material (more than trivial) influence” on the treatment complained of [para 745]. The Tribunal applied that test, and applied it unevenly — which is the measure of its care.

On the initial decision to accept Professor McMahon’s grievance, it answered no. Professor Peake’s view was simply that “a complaint had been made and should be investigated”; the protected disclosures had “less than trivial influence on that decision” [para 810]. The Tribunal refused to let the momentum of its own conclusion carry that far.

Where influence was found, it was found on the specific evidence. The continuation of the investigation after the HR Director’s “counter-complaint” email drew the inference of material influence because no credible explanation existed [para 818–819]. The delay in concluding the investigations was attributed the same way: the disclosures raised matters “repeatedly described as serious and urgent”, yet the University’s response was “prolonged inertia”, and in the absence of a credible explanation the Tribunal inferred material influence [para 857], [para 859]. The mishandling of the 30 August 2022 grievance was explained by the same mechanism: an institutional mindset in which HR “formed the view that he was a troublemaker due to his whistleblowing” [para 880].

On the grievance itself, the Tribunal held the manner of the Claimant’s conduct was a factor but not the whole. The manner of circulating the Delays Document was “part of the reason”, but “the contents of the protected disclosures were a large part of the reason why Professor McMahon filed his grievance” [para 790]. The distinction between manner and contents was not allowed to dissolve the connection.

The Tribunal was equally clear where influence was absent. On the office location, it found the delay “had nothing at all to do with the Claimant’s protected disclosures”, but resulted from the difficulty of coordinating moves and engaging with Professor McMahon [para 970]. On the insurance policy, Mr Halls’ evidence answered the “reason why”: standard practice, with “no more to the decision than that”, and the disclosures “of no influence at all” [para 976]. The causation findings, in other words, were discriminating rather than uniform — and the judgment’s authority rests on that discrimination.

7. The wider meaning

The Tribunal’s own warnings

The judgment opens by marking the boundary of its reach. It was “not our function (nor do we have jurisdiction) to conduct a public inquiry into alleged bullying or misogyny within the Institute of Astronomy” [para 2]. What it decided was narrower than the public interest the case attracted: whether disclosures qualified, whether detriments were suffered, and why [para 1]. That self-limitation is itself part of the judgment’s authority, and it should be carried into any account of the case.

Within that frame, the Tribunal was careful about what it was not finding. It found “no formal conspiracy against the Claimant”, nor that every individual acted from conscious hostility [para 759]. It did not require malice or ill intent, because the legal test does not demand it [para 751]. The pattern the Tribunal identified was neither coincidence nor conspiracy: it was “a shared desire to close down whistleblowing complaints which might be damaging to Cambridge University and the Institute of Astronomy” [para 905]. The mechanism was not villainy but opacity — decisions served up as a “fait accompli” [para 5], ghost writing “a consistent and a concerning theme” [para 6], and decision-makers who “abrogated their decision making” [para 756], leaving the complainant unable to know who decided, or why [para 757].

The Claimant had named the pattern before the Tribunal did. Writing in August 2023, he invoked the Chester Hospital Trust: “The circumstances are all very familiar. The Whistleblowers were threatened with disciplinary action. There were two external reviews that whitewashed any wrongdoing” [para 376]. In evidence he reached further, to the Post Office scandal and the observation that senior management may be “led by the nose by its own middle management & in-house and external legal advisors” [para 411]. The Tribunal did not adopt those comparisons; it did not need to. It found, in its own measured terms, the same shape of thing.

What readers should take away

Three lessons survive a close reading.

First, the whistleblower did not have to be right. The statutory question was reasonable belief, not objective truth: “A worker can be mistaken and still be protected” [para 586]. The Claimant succeeded on seven of eight disclosures, and the one that failed failed because it rested on “inference, suspicion and disagreement” rather than on events he had observed and documented [para 736]. The distinction the Tribunal drew between those two kinds of disclosure is the difference between protected speech and complaint.

Secondly, the Tribunal was discriminating rather than captured. Eleven detriments were upheld; three were dismissed [para 2], [para 3]. Causation was not assumed: the decision to accept the grievance was found to have had “less than trivial influence” from the disclosures [para 810], the office move had “nothing at all to do with the Claimant’s protected disclosures” [para 970], and the insurance policy followed “standard practice” with the disclosures “of no influence at all” [para 976]. A judgment that refuses its own momentum is one that can be relied on.

Thirdly, the human cost is the thread the legal findings do not extinguish. There was the 624 days before one grievance outcome [para 459], the sickness absence [para 394], and the Tribunal’s closing observation that both the Claimant and Professor McMahon found the proceedings distressing [para 980]. The judgment does not ask the reader to feel any particular thing about that. It states the facts, and leaves the reader to recognise the pattern for themselves.