By Andrew Marr

Let's all check our watches.

This afternoon, it's going his way. But a crucial hour for the survival of Keir Starmer as Prime Minister has just begun.

Yesterday, he lost his Chief of Staff, Morgan McSweeney.

This morning, he lost his Director of Communications, Tim Allen.

This afternoon, the leader of the Scottish Labour Party, Anas Sarwar, publicly called on him to go.

Then there was a great Cabinet-level and below rallying round. Lots of clearly orchestrated messages.

If Sarwar thought that others would follow him over the top, he must be looking over his shoulder tonight, feeling rather disappointed.

My conclusion is that the........

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