I did the Three Peaks Challenge recently – climbing to the top of Scarfell Pike, Snowdon and Ben Nevis. You’re meant to do it in 24 hours, but we did it in 24¾ hours. We ran the last bit!
We went to the Peak District to do our Duke of Edinburgh Award. They basically dropped us off and we made our own way. We stayed in a hostel the first night and camped the second night.