"It's not a matter of campaigning for or against Brexit.

"There has been a referendum in which people overall decided that we should leave the European Union and I have said repeatedly that I think the job of elected politicians is to look at the best way of extracting the best deal under those circumstances.

"Our policy on Brexit so far has been to try to secure the best deal. The manifesto of the Labour Party will be decided by the Labour Party and we've got a process for determining that.

"My view is that we had a referendum in 2016, our job has been to try to get the best deal."