So far my car has only had an oil change 4 times. I've since then only had to exchange the breaks, wheels, exhaust and one battery.
I never have changed the spark igniters and the car has never failed to start. The only trouble I had was an empty battery. So if one just drives carefully with their beloved 206 cc there is no need to spend those hundreds of pounds for the services. Just add some oil now and then and take care of breaks/wheels/exhaust.