According to
The Register, the IOC blames it all on spectators. Apparently they were using their smartphones and tweeting too much, causing network congestion that stopped the bike mounted GPS units phoning home with data. Now that couldn't have been predicted, could it?
I went out to Staple Lane with Tracey. We drove out there (a bit far for her to cycle), arriving at 7:40 (I had no idea what traffic restrictions would be in place, so how long it would take us to find somewhere to park). We came down Ripley Road; from Tythebarns Lane there were "no stopping - towaway zone" signs. But once into East Clandon, Old Epsom road where I'd intended parking was free of restrictions (presumably because it doesn't go anywhere). We went most of the way up the hill, and settled down in a field gateway with a picnic rug, some good books (I finished off David Millar's Racing Through The Dark) and a picnic. At about 8:15 a policeman warned us that the road was going to be closed completely, I tried to get through to warn Gareth but failed
They actually seemed to close it at about 9:30; until then there had been a steady stream of people walking or riding up the hill. There was a good atmosphere there, and when the riders eventually came past (pretty much exactly when Gareth predicted) we were close enough to touch them.
Back to the car, I was surprised that there was absolutely no congestion trying to get back out of East Clandon heading North - I suspect that the towaway signs had just put people off driving down that way as the only cars parked by us were the ones that had been there before we arrived (camper vans, etc.).
A bit disappointed to find out that a bug in our Humax Foxsat-HDR PVR is preventing it recording the HD olympic streams, so we didn't get to see ourselves on telly - and, more importantly, we didn't get to go back and watch the race from the start, only from when we got back home at about 12:15.
Incidentally, if you do have one of those PVRs it is possible to hack it so that it will show and record the SD streams, as long as you don't mind putting some custom firmware on it (which I did months ago to allow it to stream recordings to any computer in the house). If anyone is interested, I can talk you through it.