What did Keir Starmer know? And when did he know it?

They are the questions the Prime Minister must answer as his attempts to defend his ambassador to Washington Peter Mandelson collapse around him.

And the answers he gives will decide the future of his premiership.

I was sitting in the press gallery in the House of Commons as Sir Keir tried to excuse the inexcusable. And frankly, I could not believe what I was watching.

Time and again Conservative leader Kemi Badenoch gave Starmer the opportunity to cut Mandelson adrift. And time and again he leashed himself ever closer