If you're a fan of the hiking in the hills or mountains, taking the next step into bigger mountains or winter climbing can be a daunting one. Quite rightly too, it can be dangerous without a respect for how conditions can change and the knowledge to manage the risks. Two winters ago I joined 360-Expeditions leader and Everest summiteer, Rolfe Oostra and a group of fellow climbers and spent a week in the Pyrenees brushing up on expedition skills.