Yup, there are several types of service.
Oil Service:
* Engine oil changed, filter renewed (as above)
* Water drained from fuel filter on diesel model (one screw LOL!!)
* brake pad thickness checked (if they remember)
* service indicator reset (as above)
* Toothed belt checked at (two clips)
So yeah, oil service is just that. No air filter which gets done every 40,000 miles as an extra.
Inpection Service also includes oil and filter change but with loads more stuff like, exhaust, antifreeze, brake fluid check, gearbox, CV boots/joints, steering, tyres, battery, track rod ends, doors etc.
Anyways, you get the picture.