"If people are well equipped and experienced, it is fine to go up Snowdon, but we've had to rescue people from high up who are wearing just trainers, jeans and fleeces."

Weather conditions in the national park are fantastic, with clear blue skies and a sprinkling of frost. It is however extremely cold on the hills, with some winter routes coming in to thin condition.

Speaking on his blog Life in the vertical, local rescue team member Mark Reeves described how his Christmas day dinner was interrupted:

"As many families were tucking into their crimbo dinner, my phone was beeping away; [Walkers Cragfast on Crib coch. Team to Nant]... Judging by the kit they were wearing they hadn't thought once before heading up the hill in the middle of winter."

Mountain rescue teams do a fantastic job. You can donate to the rescue teams here: On Line Giving

Sources: Life in the vertical, BBC news