[GA flights (which are not training)] would not come under the normal flight category, but the lowest category, category Z. Flight categories are not dictated by aircraft type, but by the type of flight being undertaken.
Normal Flights = Flights which have filed a flight plan in the normal way and conforming with normal routins procedures OR Initial Instrument flight tests conducted by the CAA Flight Examining unit (RTF callsign EXAM)
Category Z = Training, non standard and other flights
So four questions then O & M,
1) Do you therefore look for a FPL for every flight that you serve?
2) How do you expect to receive a FPL for a flight which has filed one but for which your unit is not an addressee?
3) Do you mark every flight for which you have no FPL with a Z in box M of the flight progress strip as required to by MATS Pt 1?
4) Do you regard an abbreviated flight plan (MATS Pt1 Sec 1 Ch 2 9.1(b)) as a "flight plan filed in the normal way"?