Red/yellow TWU Hunters
The 2 Hunters in question were thus painted as part of a crude visibility trial. There was concern at the increased risk of collisions at low level with the advent of the much smaller Hawk in its all-over camouflage finish. Eventually the Hawks had their camouflage replaced with the current high gloss black finish.
The 'trial' was short-lived and not that informative due to the refusal of any self-respecting Hunter pilot to be seen anywhere near a banana yellow airframe. I cannot recall the 'banana jet' ever flying during my time but the crimson one did get the occasional airing.
Hope this helps.
PS Did you get my photos?