"every air to air kill by UK forces since WW2 has been by a subsonic aircraft"
But how many wars have we been in with supersonic aircraft against an enemy airforce since WWII
Korea - transonic
Suez - transonic, barely a war
Malaya - no air force
Indonesia–Malaysia confrontation - no supersonic fighters
Falklands - no supersonic aircraft available
Gulf War - not on fighter aircraft duty
Afghanistan - no air force