Rudd, left, is a year older than Johnson — but entered parliament nine years later

Boris Johnson has voiced his concern that Tory Young Turks are overtaking him in the race to become the next Conservative leader.

The foreign secretary revealed his angst about no longer being the favourite to succeed Theresa May in a breakfast meeting with Amber Rudd, the home secretary.

According to a source, Johnson said: “I really hate it when people say the Tory party should skip a generation — and go to Amber Rudd.”

The joke was that Rudd is 54, a year older than Johnson, but she entered parliament in 2010, nine years after he was first elected.

Allies say Johnson is conscious that he has only one more opportunity to be leader because a new generation of MPs is snapping at his heels.