Boris Johnson has called Labour's election campaign chief a "big girl's blouse" in a bizarre exchange before the BBC Question Time special in York.

Theresa May and Jeremy Corbyn were set to clash in the final televised showdown of the election campaign.

But before the main event Mr Johnson, the Foreign Secretary, and Andrew Gwynne, the man in charge of Labour's campaign, had an impromptu row live on Sky News.

Mr Johnson was giving an interview and Mr Gwynne intervened and said: "Long time no see. Why wouldn’t you go head to head with me today Boris?"

Mr Johnson said: “I’m being heckled by some Labour MP whose name… oh, Andrew Gwynne who has just joined me. Do you want to come and join me?