Subsequently she was selected as the Labour Party parliamentary candidate for North West Durham, with Hilary Armstrong due to retire at the 2010 general election.

"[4] In September 2015, Glass was appointed as Shadow Education Minister with responsibility for childcare by the newly elected Labour Party leader, Jeremy Corbyn.

On 19 May 2016, she apologised after calling a member of the public in Sawley, Derbyshire, "a horrible racist", which was caught at the end of a radio interview recording and reported by the media.

[7][8] At a Labour rally, she suggested voters try to persuade their mothers and grandmothers to vote to stay in, but joked they didn't bother with their grandfathers because "the problem is older white men".

On 27 June 2016, Glass was appointed Shadow Education Secretary following the resignation of Lucy Powell and several other Cabinet ministers in protest at Corbyn's leadership during the EU referendum.