Speaking to Tom Bradby on the Agenda the Prime Minister has said that the reshuffle in the Cabinet is an opportunity to "bring on fresh talent."
What you do is refresh the team and I've got a talented bunch of MPs and it's right some of them should be serving in the government.
It's an opportunity to bring forward some fresh talent. There was a mixture of people from all sorts of backgrounds and walks of life. The main thing is are they qualified to do the job and I think they will prove that.
- The Agenda with Tom Bradby will be broadcast on ITV tonight at 10.35pm
Liberal Democrat Michael Moore has been replaced as Scottish Secretary by the party's chief whip Alistair Carmichael.
This is not going to be a Conservative Cabinet reshuffle, but among the junior ranks there will be some tinkering.
Chloe Smith was just 27 when elected MP in Norwich and became David Cameron's youngest minister when she was promoted two years later.