Following the resignations of John Healey and Al Carns, Hamish de Bretton-Gordon writes in the Telegraph that Air Chief Marshal Sir Richard Knighton, who as Chief of the Defence Staff is the professional head of the armed forces, should now "show that he represents British servicemen and women by falling on his sword as well", because –

Given the colossal insult

The resignation of John Healey MP as Defence Secretary marks the end of a period in which, whatever one's political views, Defence had at its head someone who had prepared thoroughly for it in Opposition and, when the time came, did not disappoint.

I haven't met Mr Healey personally, but I've heard him speak a couple of times at RUSI