Jeremy Corbyn could become Prime Minister and Labour’s manifesto is deliverable, a former head of the Civil Service has said.

Lord Kerslake, an independent crossbencher peer, said many of Mr Corbyn's left wing ideas are "not unusual" and are common on the Continent.

Lord Kerslake who as Sir Bob Kerslake was head of the civil service from 2012 to 2015 has been appointed to advise Labour on preparing for Government.

The peer disclosed that he had also enlisted a group of ex-mandarins to help Labour prepare for government.

In an interview with The Sunday Telegraph, Lord Kerslake said: “They are doing the right thing to take these steps to prepare for government. It is what oppositions should do.