In reply to Ferret:
> Plus the ultimate would be to 'draw' a route, then automatically have it printed out in say, 2km wide stripes on a single sheet of paper!
Missed this earlier...
Do have a play with WheresThePath, then. Once you've drawn your route, and added any annotation to waypoints you want, you can print the route. WtP will then create a set of A4 pages with the map section and annotated route card, showing distance, elevation change, etc. A bit wider than 2km, but...
The other nice feature of WtP is its 'magic router', which uses PRoW data provided by published Council Definitive Mapping of PRoW data to enter footpath sections. If you turn on the magic router, as you move the mouse over the map, it will highlight any PRoW sections it finds, and, if you click on it, it will add it to the route. Where you need to link non-PRoW sections (e.g. open access land or roads), you just click the waypoints as 'normal'.
It's a very neat feature, and, since it's based on the Definitive Mapping, saves you a lot of time entering the wiggly lines, whilst being as accurate as the Definitive Mapping survey. This is the same data displayed on Dorset's geowessex GIS system (where you can enable the display of different PRoWs, and show up problem reports and their status).
WtP can also show different mapping sets, as well as displaying linked left and right panes; this is useful to show map on the left and zoomed satellite imagery in the right so you can often see where the path actually goes on the ground.