I am beginning to think I was VERY VERY lucky to finish.
Coming out of Thirsk (s'bound) I was getting a lot of strange noises from the drivetrain.
Oil on chain seemed to (mostly) cure it, but it gradually got worse again after Pock .
Put more oil on just after the bridge but little effect.
Asked Louth mechanic to put more on but he thought not needed and it was creaking from slightly loose (HT2 style) BB.
I slacked off LH crank and tightened the preload cap a nudge before refitting crank, but I was still getting occasional noises all the way to the finish (and all the way into central London for my train home)
I only looked at bike for the first time today, after various other bits of cleaning & fettling I refitted rear wheel and it was pretty well locked, the cassette lockring fouling the frame.
Wheel off again and investigate - nothing wrong with cassette or lockring, but the spacer on the drive side of the hub seemed to have retreated behind the level of the lockring. A bit of to & fro on phone with Hope, and find that not only is the spacer fubar but the outboard freehub bearing has completely disintegrated.
Seems I rode 400km on a hub lubricated by swarf !
and with the (alloy) cassette lockring grinding itself away on the (Ti) dropout.
I thought it was harder work than it should have been!