Annoyingly Google My Tracks decided not to record most of the route from Cottenham to Waterbeach; thus the recorded distance is 36.06km and the recorded average moving speed is 24.51km/h. Taking the actual distance to be 37.3km based on previous results, I calculate the actual average moving speed to be 25.36km/h.

Route:

View Cambridge Semi Orbital 10 in a larger map

Here is the Google Doc with all the stats:
http://spreadsheets.google.com/ccc?
key=0At0EKwdiLZmYdFg4Mk9fdHltdWlGeWpQTHMzM3RjU3c&hl=en_GB