Labour's extra borrowing would pay for itself, says McDonnell

The shadow chancellor, John McDonnell, has refused to put a figure on the cost of Labour’s plans for extra borrowing and dismissed being challenged on specific numbers as “trite journalism”.Asked nine times by BBC Radio 4’s Today presenter Mishal Husain how much extra it would cost to service public debt under Labour, McDonnell refused to give a figure.Instead he repeatedly claimed that extra borrowing would “pay for itself”.