Not just IFR flights
Table from Manual of Air Traffic Services Part 1 (CAP493)
A
Aircraft in emergency (e.g. engine fault, fuel shortage, seriously ill
passenger). Aircraft which have declared a 'Police Emergency'.
Ambulance/Medical aircraft when the safety of life is involved.
B
Flights operating for search and rescue or other humanitarian
reasons. Post accident flight checks. Other flights, including Open
Skies Flights, authorised by the CAA.
C
Royal flights, Flights carrying visiting Heads of State which have been notified by NOTAM/Temporary Supplement.
D
Flights notified by the CAA carrying Heads of Government or very senior government ministers.
E
Flight check aircraft engaged on, or in transit to, time or weather critical calibration flights.Other flights authorised by the CAA.
NORMAL FLIGHTS
i) Flights which have filed a flight plan in the normal way and conforming with normal routing procedures.
ii) Initial instrument flight tests conducted by the CAA Flight Examining Unit. (RTF callsign EXAM)
Z Training, non-standard and other flights.
So if yon puddle jumper has "filed a flight plan in the normal way " or even booked out (it still counts!!) he has the same "rights" as your multiseat megajet!!
However, at mixed traffic aerodromes, we do try to arrange things so that the least delay possible is caused to all. (Or the most if you annoy us).
Surfs up and its friday
Surf Bum