DH Vampire T11 at RAF Shawbury
 

Quick query regarding the Vampire T11s operated by Marshalls for the RAF at Shawbury in the 50s/60s. Can anyone tell me when the aircraft were repainted from the aluminium with high visibility dayglo striping to the light aircraft grey with fiery red high visibility striping and black anti glare panel in front of the cockpit. Trying to establish a date for a restoration project I am working on.