Just booked my mk1 172 in for its 60,000km (about 35,000mi) service
480 quid is the quote and that excludes fixing the suspected loose engine mount (shudder on pulloff, clutch is fine, engine doesnt move when revving or when trying to move it by hand in the engine bay)
Also excludes fixing the squeak from under the car when accelerating (only happens when the car is accelerating, not when free revving)