UK Labour leader Jeremy Corbyn was engulfed in a sexism row today over calling Prime Minister Theresa May a 'stupid woman' during Prime Minister’s question time in Parliament.

Corbyn faced a furious backlash from Tories and his own MPs after appearing to mouth the jibe during a stormy Commons session.

May had accused Mr Corbyn of descending into 'pantomine' over Brexit, saying his own party was not behind him.

But as the PM said down to cheers, Corbyn seemed to mutter: 'Stupid woman.'

The remark was not picked up on microphones, but politicians from both sides of the House were in little doubt what he said. 

May retorted that all MPs must refer to women in an 'appropriate' way, and after PMQs ended the House descended into chaos as Tories demanded Speaker John Bercow haul Corbyn back to apologise.

A spokesman for the Labour leader insisted he had said 'stupid people'.