[9] He also was involved in running a family business organising international conferences, interpretation, translation, microphone hire and sound systems, alongside his trades union work.

[13] Just over two months after Corbyn had won the leadership campaign, Mann continued to refuse to back him in an interview with the BBC, indicating he had no confidence in him.

[15] Mann faced criticism for allegedly perpetuating racial stereotypes against Romani people and travellers in a booklet he produced on antisocial behaviour in 2007.

[19] Following a local newspaper story in October 2005,[20] Mann raised an Early day motion calling for the psychoactive plant species, Salvia divinorum, to be banned in the UK (EDM796).

[21][non-primary source needed] It was later reported that Mann had written to the Home Secretary in October 2008, urging her to take action with regard to salvia's legal status.

"Sadly the issue has come to light again as our young people are using the internet and sites like YouTube to broadcast their friends taking the drug and witnessing the hallucinogenic effects.

Our young people are at risk and a wider cultural attachment to this drug seems to be developing that I am sure you agree – regardless of its legal status – needs nipping in the bud".

[24] He has organised numerous campaigns in his constituency, examples of which include, during 2003 and 2004, campaigning to save Bassetlaw Hospital Accident and Emergency Department,[25][26] helping former coal miners fight double charging solicitors to get their compensation back,[27] and fighting Bassetlaw District Council's policy of "topple testing" headstones in local cemeteries.

Mann said that he had made a detailed examination of hundreds of pieces of evidence from members of the public and that he believed some of the twelve former UK government ministers named were "definitely child abusers".

[33][34] In May 2009, Mann received the American Jewish Committee's Jan Karski Award in recognition of his commitment to fighting antisemitism in all of its forms.

[39] In June 2017, he criticised Corbyn as "a man who claims he's dedicated his entire life to racism"(sic) but was "not prepared to make a speech exclusively, explicitly, just on antisemitism".

[32] In September 2019, upon his announcement that he was leaving the Commons, Mann said he would "never forgive" Corbyn, believing he had allowed the party to be "hijacked" by antisemitic bigots.

On 29 January 2019, Mann was one of seven Labour MPs to vote with the Conservative Government supporting Graham Brady's amendment mandating Theresa May to renegotiate the Irish backstop in the Withdrawal Agreement.

[4] Two days later, it was reported in The Times that Theresa May's resignation honours list was held up by a row over her decision to give Mann a life peerage and that the independent watchdog on Lords appointments warned it would set a dangerous precedent and could be seen as a bribe for his support of her Brexit withdrawal bill.

White was a Labour councillor and was deputy leader of Bassetlaw District Council,[49] and was employed by her husband as a part-time office manager, remunerated through his parliamentary expenses.