First post on here so hopefully this is the right place...
I've somehow ended up being asked to plan a route for a charity cycle ride that me and a few work colleagues are doing. We're starting at Cardiff, staying over at Bristol, heading to Thatcham (near Reading) and then heading back to Portsmouth.
Does anyone have any advice as to where to start for planning the route, I believe national cycle route 4 does cover a decent chunk of the Cardiff to Bristol section and in the process of acquiring a Garmin now too.
Also, any other advice that anyone has would be more than welcome. I've done a long distance charity ride a couple of years back but planning this route is a new one to me