The only somehow "civilian" aircraft on the apron of the air display SIAF 2023 is this Dornier 228, which is operated by Canadian air carrier Summit Air on behalf of parachute group Royal Air Force Falcons.
A scan from one of my negatives of RAF Lockheed C-130K Hercules C1 XV181 getting airborne at the USAF 'Open House' at RAF Wethersfield on 21st July 1984.