OK, I hope I’ve done mine ok, but this is a street circuit in London that I’ve been thinking of for ages. I’ll concede it has one or two problems: it’s probably a bit too fast (dangerously fast) and I wouldn’t know where to put the pits but I think it’s otherwise brilliant.
http://www.gmap-pedometer.com/?r=4047934 (anti-clockwise)
Start finish straight is on the Mall, leading up to the Victoria memorial fountain, from there you turn left twice onto Pall Mall, where you head east, taking a corner past Big Ben and the Palace of Westminster, crossing the Westminster bridge. Then you head north on the east bank of the river until you turn right to go past the Royal Albert Hall. Then you head back over the river again. From there you take a left turn and head towards Trafalgar square, taking a sweeping bend around the square itself, from there it’s a straight run to the finish. Tilke – eat your heart out!