"caught red handed" but doing no more than many (most ?) MP's and probably almost all ex-ministers do.
But most ministers aren't Chairman of the Intelligence and Security Committee with oversight of UK national intelligence machinery.
However, he visited my last unit for lunch last Spring and he struck me as a decent sort who was very much an honourable type, so not surprised he has jumped before being inevitably pushed. However, it does bring into play a question of judgement, which given his position made his position untenable.