Now, now - no excuses - you've got a back-up bike! That killer hill is at the end and is optional. I don't think there is anything else that you'd struggle on.
You tell 'im! And possibly 'elp 'im too before he does any more damage mis-tweaking the bike!
Thanks for the offer Dan, unfortunately I didn't see it until after I got back from the lbs.
Verdict is either a Kapput freehub and possibly cup and cones too, the difference in fixing it and replacing it like for like is about £15 so have provisionally gone for a new wheel to be fitted tomorrow afternoon.
The other alternative is to strip it down, order new freehub(3 days) then re-assemble it all with possibly new bearings as well.
At first they were struggling to fit me in until the "20th which would have meant I might miss SITD, it does get busy in there.
So I should be available Saturday albeit on the heavy hybrid, unless by some miracle the bike is ready by 5pm tomorrow, doubtful as I can't take it in until after 2pm.