24K Service
Seem to remember paying a little more than that for mine, mind you that was after some negiotation, they (Mill Garages, Sunderland) originally wanted nearly £500. So for a dealer service it's not too bad.
Mind you when you look at what they do you realise you are paying a lot of money to them to check tyre pressures and brake pads. Best bet is to do most of the simple stuff yourself.
Change the Oil & Oil filter
Change the Air filter
Change the Plugs
Check and replace the Brake pads if necessary
Check Tyre Pressures
None of these are particulary difficult but cost you £40+ per hour labour for the dealer to do it.
If you can:
Balance the Throttle Bodies
Check & adjust the Valve clearance
Change the Brake Fluid
Doing all the above and advising the dealer you have done so will save you a lot of money, they can do the computer check and any of the jobs you can't manage. You should still get the dealer stamp in your book.
Parts for a major service cost less than £100, the rest is labour & dealer mark up on fluids & parts. Get most of the bits I need from Steptoe.
I do all my own serving now, it's not hard and only takes 3 - 4 hours for a mechanically inept like me. Used to take me the best part of 3 hours riding each way to get to a dealer so I save time & money.