I will be visiting next month looking to climb scaffel pile, skiddaw and helvellyn . Investigating the OS maps however, it appears to me that they're all on a different map (please correct me if I'm wrong I had a bit of a nightmare trying to work out what was where). Does anyone know if a map or guide book that covers all 3? I'm only visiting for 3 days and seems a bit much to buy 3 maps, though obviously I will if that's the only option.