[3] In 1998, Shawcroft stood for the party's National Executive Committee (NEC) as part of the Grassroots Alliance slate.
[9] In 2015, Shawcroft was briefly suspended from the Labour Party after she gave support to Lutfur Rahman, the former mayor of Tower Hamlets.
[10][9] During the process to choose the next general secretary of the Labour Party in March 2018, following the resignation of Iain McNicol, Shawcroft was vocal in her support for Jon Lansman of Momentum over Jennie Formby of the Unite union, a contest which was proving divisive among supporters of Jeremy Corbyn.
[16] Alan Bull, intended to be a candidate in the 2018 Peterborough City Council election, had in 2015 shared a (faked) article in a closed Facebook group headlined: "International Red Cross Report Confirms the Holocaust of Six Million Jews is a Hoax" accompanied by a photograph of the gates at Auschwitz, to "invite discussion and debate".
[19] A few days later, after seeing the "abhorrent image", she wrote on Facebook that she had told the member that he should be sent for training about antisemitism, and that the issue within the Labour Party was being used to attack Jeremy Corbyn.
[21] On 31 March 2018, Shawcroft issued a further statement in which she indicated that, while "it has been a privilege to serve on the Labour party National Executive Committee for the last 19 years", she was resigning from the body "with immediate effect".