that sounds about right for dealer price, but like mantamad say's you'd expect that to include a good warranty atleast.
56K is about average for a 3 1/2 year old Diesel, oh you have to get the cam belt and water pump done at 60K which will cost you about £300 at the dealer, i got mine done locally for £220 so you might want to mention that when you haggle, obviously the 60K service would also include the normal stuff so at a guess with the cam belt about £500.