The Attorney General has blocked Britain from defending Israel from retaliatory strikes by Iran, it was claimed last night.

Despite the UK previously coming to the aid of its ally, Lord Hermer is said to have warned against intervention in the latest conflict, which began on Friday with Israel bombing its long-time enemy.

In October, the RAF helped shoot down Iranian missiles fired at Israel in a previous attack.

But there has been no British military involvement so far this time.

One Whitehall official told The Spectator magazine Lord Hermer, a human rights barrister and stickler for international law, was 'acting as a restraining force'.