Captain Dart
"P.P.S. Is it true that the only aircraft shot down by the British RAF since the end of World War Two have been their own?"
Not true.
Falklands War "Britain’s 21 air-to-air kills by Harriers carrying AIM-9L Sidewinders".
11 IAI Dagger A 9 by Sea Harrier
10 A-4B Skyhawk 3 by Sea Harrier
7 A-4C Skyhawk 2 by Sea Harrier
3 FMA IA 58 Pucará 1 by Sea Harrier
3 A-4Q Skyhawk Navy 3 by Sea Harrier.
2 Mirage IIIEA 1 by Sea Harrier
2 B.Mk62 Canberra 1 by Sea Harrier
1 C-130E Hercules 1 by Sea Harrier