WhitstableDave - why the rolling eyes? Is that really necessary?
To the OP, good luck with your search, but I would really recommend an app such as the OS. You can plot a route in advance, and then follow it on screen - great in easy country. If you are venturing into the hills, maybe think about a navigation course - it could get you out of lots of difficulties, and would boost your confidence so that you do not need to rely on others for your routes.