If your phone runs any kind of WinMo (smart phone, windows operating system) and has a built in GPS load up winpilot.
WinPilot runs a treat, shows airspace in 3d, you can use it for very detailed route planning. also has info on most airports. Assuming this is a "back up" only the battery life of around 3 hours (most phones) shouldn't be a problem
anyone who still persists in using a map (be it michelin or CAA) to navigate around is a danger to all and sundry and should get with the times.
Far better to be looking for traffic than messing about with a map.