Just to update, I've spoken to two other dealers now and the price is the same, apparently the biggest service of the warranty. Next year drops back to stupidly cheap.
Checking the manual online apparently a full service of: oil/filter, air filter, spark plugs, brake fluid, pollen filter, various other items plus they are recommending an aircon and fuel system flush (must use as much fuel as possible before Friday!).
A way of getting more money whilst the car is in warranty and/or PCP loan terms? I'll leave that there :-)
2015 500X Pop Star, 1.4