On 30th August 2017, following his comments in , Mr Williamson responded to calls for him to be sacked and to withdraw his comments by stating: “I absolutely did not and never would blame the victims of antisemitism or any form of racism and bigotry. Antisemitism is utterly repugnant and a scourge on society, which is why I stand in absolute solidarity with anyone who is subjected to antisemitic abuse. The point I was trying to make is that accusations have on occasions been used for factional or party political ends.”
In September 2017, the Campaign Against Antisemitism wrote to Mr Williamson for comment regarding  and , but did not receive a response.
On 17th March 2018, it was reported in the Jewish News that Mr Williamson was a member of a deeply antisemitic Facebook group, Palestine Live. Responding to the allegation, Mr Williamson reportedly told Jewish News: “I get well over a hundred notifications from social media every single day. I was not aware that I was added to this group nor have I participated in it. Upon being informed that I was a member I have left the group. Facebook should change its settings to enable users to accept or decline membership of groups.”
On 17th July 2018, it was reported that Mr Williamson had attempted to block a motion proposed by two Jewish MPs from being brought before the Parliamentary Labour Party (PLP) the previous evening. The motion stated: “The PLP adopts the full IHRA definition of antisemitism, including all of its accompanying examples, and believes this should be used to define, understand and act against antisemitism in the Labour Party.” The motion was passed.
On 1st August 2018, it was reported that Mr Williamson had attended a Momentum meeting in Liverpool on 31st July 2018. At the meeting, it was reported that a member from the Sefton Constituency Labour Party had stated: “What could be a greater threat to our democracy than a foreign government who is trying to veto the person we want for Prime Minister? Of course, I’m talking about the Israelis with their foot soldiers in Labour — the LFI, the JLM. They are trying to take our democracy away from us.” It was reported that Mr Williamson had failed to challenge the speaker, and that he had stated: “I understand the reasons why some feel cowered [sic]…”
On 20th August 2018, it was reported that Tessa Milligan, a Jewish member of the Labour Party, had filed a complaint against Mr Williamson, including 20 pieces of evidence; for example, his having supported the view that those raising claims of antisemitism in Labour were engaging in a “witch hunt”. A Labour Party spokesman had responded on 18th August 2018 by stating: “The Labour party takes all complaints of antisemitism extremely seriously…All complaints about antisemitism are fully investigated in line with our rules and procedures and any appropriate disciplinary action is taken”. The Labour Party complaints team had stated: “Having reviewed your complaint I can inform you that this matter was passed to the Chief Whip who has spoken to Mr Williamson reminding him of the conduct expected of him.”
Also on 20th August 2018, it was reported in The Times that Mr Williamson had been reprimanded by Labour’s Chief Whip. A party source had reportedly said that, because Ms Milligan’s complaint concerned Mr Williamson’s attitude to allegations of antisemitism rather than alleged acts of antisemitism he himself had committed, it could not be dealt with under Labour’s Code of Conduct, which is why it became a matter for the Chief Whip.
On 24th September 2018, it was reported that the then National Chair of the Jewish Labour Movement, Ivor Caplin, had said in relation to Mr Williamson’s sharing of a platform with Tony Greenstein [15h]: “The Labour Party claims it has made it clear that MPs should not share platforms with those who have been expelled from the party.” Mr Caplin reportedly renewed a call for the Labour Party to remove the whip from Mr Williamson. It was also reported that the Party had confirmed that Mr Greenstein, who had been expelled in February of that year, did not have a conference pass.
On 27th October 2018, the day eleven people were murdered in a Pittsburg Synagogue, Mr Williamson tweeted: “Wow, well blow me down with a feather”, with a link to an article dated 27th October 2018, which contained a false accusation by Skwawkbox against a Jewish charity. The Skwawkbox is a recognised ‘fake news’ site. The insensitivity shown by the timing of Mr Williamson’s tweet, as other political figures were expressing support and sympathy for Jewish communities, was widely condemned, including by Labour MP Wes Streeting, who called his behaviour “a new low.”
On 27th November 2018, it was reported that, in response to Mr Williamson’s accusation in , Sheffield University Jewish Society president Gabe Milne had tweeted: “And for the 10,000th time: We never said Chris Williamson was antisemitic. Not once. We said he encourages a culture of antisemitism, which is clear to everyone except the disgraceful people that continue to support him.”
On 21st December 2018, Mr Williamson tweeted in relation to [15i]: “APOLOGY Earlier today I tweeted a petition about an Islington Council ban against the Blockheads performing with their chosen line up. The council has blocked jazz musician Gilad Atzmon from playing with the group. Since then I’ve learned that Atzmon…is not confined to the jazz world. I am told that in various blogs and in speeches he has adopted antisemitic language. I wasn’t aware of this until after I tweeted the petition. As soon as I was informed, I deleted the tweet. I’ve always condemned all forms of racism, including antisemitism, and strongly disassociate myself from Atzmon’s antisemitic views. I therefore apologise for tweeting this petition and any distress or offence it may have caused…”
Later on 21st December 2018, it was reported that a number of far-left activists and commentators had condemned Mr Williamson’s support for Mr Atzmon, notwithstanding his apology, including Momentum campaigner Mike Segalov, who tweeted: “apologise, @DerbyChrisW. just deleting this isn’t good enough. educate yourself. stop embarrassing yourself and the left.” Then, following Mr Williamson’s apology, he tweeted: “why the f*** did you think he had been banned by the council then? why did you sign a petition before reading it?”
On 23rd December 2018, it was reported that 30 University Labour Clubs had issued this statement: “Today Chris Williamson’s actions have again shown a complete lack of respect for the Jewish community. He repeatedly platforms and supports antisemites and takes no responsibility for his actions. We wholeheartedly condemn this…It’s disappointing that the Labour Party have not yet taken appropriate action. Whilst we welcome his apology, we still urge them to withdraw the whip from Chris Williamson until he listens to the concerns of the Jewish community and properly educates himself about antisemitism.”
On 21st January 2019, Mr Williamson tweeted: “It is Holocaust Memorial Day on Sunday. Hatred and bigotry led to the unimaginable horrors of the holocaust. We must never forget and always strive to build a better, peaceful and compassionate world through love and solidarity.” Members of the Jewish Community condemned his action, including Karen Pollock MBE, Chief Executive of the Holocaust Educational Trust, who tweeted: “Making a mockery of the memory of the Holocaust is repulsive.”
On 31st January 2019, it was reported on Derbyshire Live that Labour leader Jeremy Corbyn had said: “Chris Williamson is a very good, very effective Labour MP. He’s a very strong anti-racist campaigner. He is not antisemitic in any way.”
On 19th February 2019, it was reported that Mr Williamson had retweeted a video from an account which had previously posted Holocaust revisionism and other antisemitic content.
On 26th February 2019, it was reported that Ruth Smeeth MP had brought the matter of Mr Williamson’s booking of a room in Parliament on behalf of JVL  to the attention of the previous evening’s meeting of the Parliamentary Labour Party, and had commented: “It’s outrageous that a member of Parliament is giving a platform to an organisation that seems more intent on characterising the antisemitism crisis within the party as smears rather than being part of [the] solution.”
On February 26th 2019, Tom Watson MP, having been alerted to the booking above, responded by tweeting: “Just for information — as soon as I found out about this I reported it [to] the Chief Whip and General Secretary.”
On 27th February, It was reported that Mr Williamson had responded to the resignations of Labour MPs, on 18th February 2019, by singing the 1980s hit Celebration, and had told his audience in Sheffield: “I was singing that all day in my office full blast, and my office, by the way, is right opposite Joan Ryan’s.” Joan Ryan MP, one of those who had resigned from Labour on 18th February, cited antisemitism as her principal reason for leaving the Party.
On 27th February 2019, it was reported in The Guardian that Labour’s Chief Whip Nick Brown and the party’s General Secretary Jennie Formby were going to contact Mr Williamson to stress their displeasure at his actions and ensure he cancelled the booking.
Following the exposure of Mr Williamson’s comments at the Sheffield Momentum meeting , it was reported on 27th February 2019 that he had been placed under a “formal notice of investigation” over a “pattern of behaviour.”
On 27th February 2019, Mr Williamson tweeted: “A personal message and sincere apology from me regarding my recent remarks on anti-Semitism [sic] in the Labour Party”. He attached the text of a full apology in which he stated: “…On a personal level, I have been an anti-racist all my life…It pains me greatly, therefore, that anyone should believe that it is my intention to minimise the cancerous and pernicious nature of anti-Semitism [sic]…Whilst it is true that there have been very few cases of anti-Semitism [sic] in the Labour Party…it is also true that those few are too many…I am therefore sorry for how I chose to express myself on this issue…” Tom Watson tweeted in response: “Chris Williamson has produced a long-winded and heavily caveated apology. It is not good enough. If it was in my gift I would have removed the whip from him already.” He embedded his letter to Mr Brown and Ms Formby, in which he stated: “…I formally request that Chris Williamson has the Labour whip removed from him and/or is suspended from the Labour Party.”
A number of other Labour MPs also responded to Mr Williamson’s tweet. For example, Wes Streeting MP stated: “I do not believe this is sincere. I believe you have deliberately baited Jewish people in our Party and across the country. I think you were caught in a moment of honesty saying what you really think. It was repulsive, revealing and you should be expelled from the Labour Party”; former Labour leader Ed Miliband tweeted: “Chris Williamson is bringing the Labour party into disrepute over anti-semitism [sic]. This is a test of seriousness on our part about the whole issue. Disciplinary action, not simply an apology, is required.” Dame Margaret Hodge MP wrote: “I have just written to the Chief Whip demanding Chris Williamson have the whip removed…”; Yvette Cooper MP tweeted: “…Agree with Tom Watson and Ed Miliband on immediate suspension needed…” In addition, Tim Roache, the General Secretary of the GMB Trade Union, stated: “Agree. Time for him to go.”
The Labour Party Tribune Group of MPs tweeted: “We must set the highest standards for ourselves on issues of racism, sexism and bullying if we are to be seen as a party that can lead on behalf of all sections of our communities.” Embedded in the tweet was a letter to Labour General Secretary Jennie Formby, in which they wrote: “…Our response to a member being antisemitic, must be to apologise to those who have been offended and then investigate. Where guilt is proven, that person’s membership should be revoked…The complaint that the Labour Party is institutionally racist…is being made because of the values that are being applied when cases related to sexism, bullying and racism are being adjudicated…if the values that underpin our tolerance to bullying, sexism and racism are absent, then we invite the accusation that the Labour Party is institutionally racist…[Chris Williamson’s] actions have brought the party into disrepute… should have his membership suspended and the whip removed while the investigation takes place.” The Tribune Group describes itself as “…the voice of the centre left of the Parliamentary Labour Party…”
On 27th February 2019, it was reported in The Independent that Mr Corbyn’s office had seemingly intervened to prevent Mr Williamson’s suspension, but following threats of front-bench resignations, demands for action from MPs and Jewish groups, and the Parliamentary Labour Party (PLP) committee’s “totally unprecedented” decision to ask Mr Williamson to stop attending PLP meetings, the Party had finally announced that Mr Williamson had been suspended pending an investigation.
Later that day, it was reported in The Guardian that Mr Williamson had indicated his intention to clear his name, insisting: “I think I’ve got a very strong case. There is no evidence against me in reality.”
On 28th February 2019, it was reported in The Telegraph that Mr Corbyn had let it be known that he did not want Mr Williamson suspended, but it was only when it became clear that this was a “PR disaster” that the whip had been removed from the MP.
On 26th June 2019, it was reported that Mr Williamson had been readmitted to the Labour Party despite a recommendation by Party staff that he be referred to the next stage of Labour’s disciplinary process. He was instead issued with a formal warning after being found to have breached the party’s rules. A Labour source reportedly said: “He could face further, more severe action if he repeats any similar comments or behaviour.”
On 27th June 2019, it was reported that over 90 Labour MPs and peers had signed a letter demanding the whip be removed from Mr Williamson. The letter called on Jeremy Corbyn to “show leadership” by asking for “this inappropriate, offensive and reputationally damaging decision to be overturned and reviewed”, and described the way in which the decision-making panel’s composition had been changed at short notice as seeming “highly irregular” and having the “appearance of political interference.”
Also on 27th June, it was reported that Keith Vaz MP had written to Labour General Secretary Jennie Formby suggesting that the decision to readmit Mr Williamson (to which he, as a member of the NEC disputes panel which ruled on the case, had been integral) should be reconsidered.
On 28th June 2019, it was reported that the whip had again been removed from Mr Williamson.
On 29th June 2019, it was reported that Mr Williamson was facing deselection by local Party activists and trade unions angry at his comments about antisemitism, with plans being put in place to deselect him even if he should be readmitted to the Party (a process permitted under Labour Party rules). Mr Williamson was reported to have tweeted: “They say a week is a long time in politics: it seems two days is even longer. I’m naturally concerned by the lack of due process and consistency in how my case is being handled. I’ve been a loyal Labour member for 43 years, and will do my utmost to fight for my membership.”
On 9th July 2019, it was reported that a fresh panel of the NEC’s disputes committee had referred Mr Williamson’s case to a specialist panel who would reassess his conduct to determine whether a full investigation was warranted.
On 31st July 2019, it was reported that Mr Williamson had been referred to Labour’s National Constitutional Committee for expulsion, and that a statement on his official Facebook page had called this “a total subversion of due process.”
On 11th August 2019, it was reported that former members of Mr Williamson’s staff had expressed concern over his failure to distance himself, when requested to do so, from the Labour activist Scott Nelson who was expelled from the Party over antisemitism.
On 14th August 2019, it was reported that Mr Williamson was suing the Labour Party in an attempt to overturn his suspension.
On 24th September 2019, the film director Ken Loach, a supporter of Jeremy Corbyn, gave an interview in the course of which he stated: “Everyone knows Chris [Williamson] is not an antisemite.”
On 10th October 2019, it was reported that Mr Williamson had lost his appeal to be reinstated by the Labour Party, although the High Court ruled that his second suspension (in June 2019) had been unlawful. However, it transpired that Mr Williamson had been briefly reinstated and suspended for a third time during the appeal proceedings, and the presiding judge upheld the lawfulness of this suspension, saying: “I therefore refuse relief in respect of Mr Williamson’s recent re-suspension. The new disciplinary case must run its course.”
On 6th November 2019, it was reported that Mr Williamson had been barred from running as an MP in the 12th December General Election.
Later on 6th November 2019, Mr Williamson resigned from the Labour Party, and announced that he had decided to run as an independent MP in his former constituency of Derby North. His resignation letter was described by Campaign Against Antisemitism as “a manifesto against Jews” and contained several antisemitic tropes.
Owing to the conditions of secrecy imposed by Baroness Chakrabarti’s report on antisemitism in the Labour Party, the processes by which the various decisions were made to reinstate and resuspend Mr Williamson remain unknown.