Bear and Ragged - "OS style maps, it's worth looking at TalkyToasters maps for Garmin GPS"  (can't get the forum Quote thing to work!)

Thanks for the suggestion, I've looked at these locally and they aren't up to much!  According to the TT maps there is a footpath running behind our house, and I know for a fact there isn't!  And when we go to Scotland, or even the remoter parts of Wales I'm not confident I can rely on them.