Popular adventurer and evangelical Christian Bear Grylls is optimistic about young people, and future adventures, and said it would be 'amazing' to take President Trump to a desert island.

Grylls was speaking in an interview with the Radio Times.

The adventurer previously took President Barack Obama into the wilderness of Alaska on his popular US show Running Wild. Asked if he would like to take Donald Trump to a desert Island, he said: 'It would be amazing. Of course. And, there's no doubting he's tenacious. Obama liked stepping out of his comfort zone, and that attitude is good in the wild. He told me it was one of the best days of his presidency.

'But I don't know... Donald Trump is a person who likes to be king and the one thing I've learnt in the wild is you're never the king. You've got to learn to put the crown down.'

Grylls a former reserve-soldier in the SAS, became the Chief Scout in 2009, leading the popular, global adventuring initiative for young people. Numbers in the Scouts have reportedly boomed since Gryll's appointment. He is optimistic about young people, who he says 'get such a hard time. You know, the so-called 'hoodie generation'. But...young people are incredible. What they lack is opportunities.'

A father to three boys, Grylls said he tries to limit the amount of digital screen time his children have. While he celebrates the use and entertainment the modern communication can have, he warns his boys: 'it's about who's master. My line is, 'Make sure the phone's your servant, you're not its' – you become that when you can't do anything without blankly staring into the thing.' He celebrates the 'God-given' gift of imagination but, he says: 'nothing decays imagination faster than screens.'

Grylls is also the front-man for much of the publicity for the evangelical Christian outreach programme Alpha, and has often been outspoken about his faith and its effect on his life.

At 42, he is apparently full of energy for the future. He said: 'I'm 42 years young! I train harder than I ever have before, I get smarter and I've learnt to be very mindful of risk. But I don't want to reach the end of my days in a perfectly preserved body. I want to come in sideways, covered in scars, beaten up and screaming, "Yahoo! What a ride!"'