Bear Grylls has eaten frozen yak eyeballs and camel intestinal fluids but he admits to dreading being offered delicacies after one experience with Berber tribesmen in the Sahara.

Grylls, who presents survival programmes on TV, admits the unresolved conflict in his life is that he is constantly leaving his wife and young children and putting himself in the way of danger.

Bear Grylls speaks to Kirsty Young on Radio 4's Desert Island Discs on Sunday 27 November at 11:15 GMT, repeated Friday 09:00 GMT. Listen online or browse the extensive Desert Island Discs archive.