To cut a long story short we were doing time trials and I stacked in the rhythm section of the track (high speed bumps) and crunched my left shoulder into the next up slope.
Initially I thought it was dislocated, then it was thought to be broken collar bone - but no, I've stuffed the A C joint. I have to go into the city next week and organise authopedic surgery

Currently in a sling and a fair amount of pain (which VB is promising to cure)