Anyone who's met me knows how much I like to sleep in extreme places. I do it because I love the exhiliration of spending a wild night out under the stars, being at one with nature.

But every year around 150,000 young people experience a problem – be it with their parents or step-parents – that results in homelessness, meaning they have no choice but to sleep rough. For them it is not fun, it is not exciting and at the end they don't get to go back to a warm home to share their stories.

It's easy to forget that - especially at Christmas. So, instead of spending the run up to the big day in the shops or out indulging in the excesses of the season, I'm setting myself a sleeping challenge. I'm taking the issue of homelessness to new heights – literally. I'll be camping out on the top of the highest mountain in England, Wales and Scotland, by myself to try to raise awareness and cash for Centrepoint.

Centrepoint helps over 9,000 homeless 16-25 year olds into a home and a job every single year. But with more funding they could do so much more. That's where you come in...

Follow my Sleep the Three Peaks for Christmas Challenge - on Twitter and Instagram @PhoebeRSmith and please consider donating – even just the price of a coffee – to enable more young people to spend the night out in sleeping bags for fun and not necessity.

Thank you so much for you support.

Phoebe x