So I've decided to buy a GPS unit for the bike - a Garmin Etrex 30, which was recommended in the CTC's Cycling magazine. I've loaded OpenStreetMap maps onto it, which seem to have good coverage and plenty of detail for my purposes, and they are free. The disadvantage is that I have to plan my route beforehand, on the PC, and then download it to the Garmin (there are other ways to use the GPS but this seems to be recommended). After a few test rides, and some fiddling around with setup options, I'm very pleased with this choice - the batteries last a long time and the maps are easy to read.
Another plus point is that I've had several happy evenings on the PC looking at maps and using bikehike.co.uk to plan my routes, think about what I want to see, and I'm looking forward to it even more now :-)
Edit: here is the GPS itself:
My new Garmin Etrex sat-nav. |