There is no love lost between John Bercow and Boris Johnson but the Prime Minister managed to bite his tongue as he bid farewell to the Speaker in the Commons just now.

Boris paid tribute to Bercow’s ‘Tony Montana scowl’ and called Bercow an ‘uncontrollable tennis ball machine’ for peppering parliament with his numerous interventions during debates.

Boris went on to say that Bercow had ‘done more than anyone since Stephen Hawking to stretch time in this session’ and that he had had ‘the longest retirement since Frank Sinatra’.