I fought the log…
… the log won. It turns out that trying to ride the log bridge at Cannock in the damp, on a rigid bike with semi–slick tyres at 55psi, is not a good idea. It was going OK until the little drop in the middle; the front wheel bounced onto the edge of the log and from that point there was no chance of a recovery.
I have an excellent selection of bruises and grazes including, but not limited to, L wrist/forearm, R elbow, chin, chest, and L. thigh. Ow Ow Ow.
Stupid bloody singlespeed.