David Cameron says family is the most important thing in his life and also "the best welfare state". He said people want to see a connection between what makes politicians tick and their policies.

He also comments on his wife, Samantha, participating in his campaign, saying that it is great to have her on the election trail.

He was speaking to Dermot O'Leary in one of a series of interviews for BBC Three with the three main party leaders as well as the SNP and Plaid Cymru leaders.

Dermot meets... David Cameron is on BBC Three, Wednesday 21 April, 2000 BST and afterwards on iPlayer.

Dermot meets... Nick Clegg is on BBC Three, Wednesday 21 April, 2030 BST and afterwards on iPlayer.

Suggest a question for Dermot to ask Gordon Brown or for the interviews with the SNP and Plaid Cymru leaders.

BBC Three is also staging a First Time Voters Question Time programme hosted by Dermot O'Leary and you can apply to be in the audience in London on Tuesday 4 May.