"Sal planned it for almost a year before they ran. She nicked an Ordnance Survey map from the school library. She bought a compass, a Bear Grylls knife, waterproofs, and a first aid kit from Amazon using credit cards she'd robbed. She read the 'SAS Survival Handbook' and watched loads of YouTube videos. And now Sal knows a lot of stuff. Like how to build a shelter and start a fire. How to estimate distances, snare rabbits, and shoot an airgun. And...