Having helped at an AFISO unit there is definately a big difference between an AFISO information service and air ground. An AFISO will have had to pass a very tough ATC exam, medical and be subject to frequent inspections from the CAA.. .. .If you look in Pooleys or the Air Pilot it clearly states that at weekends Fenland is an information service. The controller will also say information in all his calls. This is not an air ground service it is an ATC service - that's why you get different instructions. . .. .There are however many air ground services who think they are full controllers and will give you more instructions than an AFISO!!!