It follows a complaint by the Shadow Home Secretary that she was treated unfairly on last Thursday’s programme.
Accusing the programme of legitimising racist abuse, Abbott’s supporters claim she was repeatedly interrupted, with Bruce stepping in to correct her, wrongly, over the latest Labour polling figures.
The BBC later apologised while vehemently denying false claims, which have since gone viral, claiming that Bruce “whipped up” ill feeling towards the Hackney North MP by joking with the audience that she owed her seat to a past relationship with Jeremy Corbyn.
A BBC source told the Telegraph there was a “predictability” about the backlash from Momentum, which has previously singled out Laura Kuenssberg, the BBC’s political editor, for abuse. The journalist, the first woman to hold the job, had to be given a bodyguard for the Labour party conference in 2017 after being jeered for her treatment of Jeremy Corbyn.