Yep, fair point about riding at his speed - this is of course what I've been doing so far... but when I only manage to fit one long ride in a week it's a shame never to be able to push a bit. Not interested in racing or bragging rights, but going fast (well, fast for me) is just, well, fun
MikeG, great idea about letting a little air out of the tyres, I'll give this a go tomorrow.
17mph is a PB average speed, over 28 rather flat miles - over typical Devon (hilly) routes I'm much closer to 15mph. I used to ride 30-50 miles on weekend jaunts, so the 60 mile target will be no problem - it's more about finding the time at the weekends to fit it in.