John McDonnell was again unable to say how much Labour’s spending plans would cost Britain in two further shambolic interviews this morning. Asked on both the Today programme and 5 Live how much extra would be spent on servicing government debt under Labour, a rattled McDonnell was eight times unable to give a figure. He snapped:

“This is a trite form of journalism, that’s why we have iPads and advisors… It’s minimal… I’m telling you, it pays for itself, it pays for itself.”

Alas the Shadow Chancellor was unable to explain how borrowing would “pay for itself”. Someone get him that iPad for the next media round…