My 5-Spot is really, really overdue a bit of TLC (inc. DHX shock and RC40 fork) but I've not had entirely happy experiences with some of the shops round here…
So, has anyone got any sensible suggestions of a shop in SW London / Middlesex / Surrey way that'll do a good job servicing my Turner and associated bouncy bits??

Brixton Cycles – Brixton, natch
Nirvana – Westcott, near Dorking
Moose Cycles – Tooting, innit

All three are very, very good.

Another vote for Brixton Cycles, top notch shop.
Probably worth sending the shock off to TFTuned yourself. Not sure who'll do the forks – Pace might if you ask nicely, otherwise Evans would be worth a shot – the forks get sent to the Kendal branch where a fully qualified suspension mechanic deals with them. He posts on here sometimes, top bloke, really knows his stuff.

Send the shock to Mojo – Tf won't service DHXAir, fork to Pace or whoever owns them now. Service the rest yourself, get a proper grease gun with a curved spout, grease the zerk bushes. It's not rocket science, and you'll probably do a better job than a shop – I know I would!