Thanks for all the input. I have downloaded both Trailguage and Accuroute. Without being paid by Andrew I confirm that I prefer Trailguage. The best map I could find was on the Ordnance Survey website and it has been great at accurately measuring my local running circuits. I had measured all in the car but was not sure whether this would over or under read (the car was out by +.2 of a mile).
Hi I use Sub 4 lycra shorts as I suffer with the same. They are great for stopping the chafing and also keep you cool. Sub 4 also do some thicker ones for winter running. I buy mine from the Sweat shop but all running stores should sell sub 4 kit.