I use a piece of software from anquet maps to plan routes. THe version I purchased cost £35 and covers the Welsh National Parks, which is handy as I live in the Brecon Beacons. The sell versions that cover the other national parks for the same price or for £120 you can get either the south of Britain or north of Britain. I comes with digital 1:50,000 OS map of the area covered. It allows you to plan a route and provides distance covered, min height, max height, total ascent, waypoints, route desrciptions, etc with compass bearings. show the profile of the route, showing all the ups and downs, efc. Routes can be downloaded to GPS, map of route printed off. As soon as OS release 1:25,000 maps digitally they will become available as well.
