Its a 57 reg model so yes you're right, the warranty will be up shortly - Sept 10!

I think it is a fairly detailed check from what they say, i'm going to try and haggle them down a bit, but I just don't want it to detract away from the re-sale value if i decide to change cars in the next 6 months?

I was thinking the same, to be honest.

This really is excessive. The last warranty service I paid for on a Hyundai two years ago, which also included the cam belt change( the car was near its 50,000 mile limit), was £ 360. This is a bit rich for a glorified oil change, but dealers can be like that as, unless you're buying another car from them, they know after the warranty expires you won't be using them for servicing and want as much as they can get from you. I saved £ 150 last year on a major service on a Nissan which was post warranty by using a local idependent even though I got the usual begging letter about how important it was to use a main dealer. Same as in the autumn it will only need an oil and filter change that most reputable independents will do for £ 30.