Most of the Mk1s had a service (i.e. oil change) at 6k for petrols and 5k for diesels. The latest Mk2s have them every 18k for mainstream models. My mum and bro picked up a 1.2 Dynamique the other day and were told 18k miles, to which I said but what about oil degredation? Seems thats not an issue these days, but it makes me very suspect! My Williams oil was black by 6k miles!
Most people wouldnt have a clue to check their coolant and brake fluid levels, let alone some of the more complicated procedures! To be fair, they do say 18k OR 1 year (the sooner of the two), but its still a hell of a lot of miles for tyres, brakes, oil etc if you assume complete novice-ness on behalf of the buyer.