ZD321 with the Welsh Cat on the fin. In the early Harrier days, pilot conversion was carried out by 233 OCU. From 1 September 1992 all RAF conversion training is provided by 20(R)Squadron at RAF Wittering.
41(R) Squadron at RAF Coningsby is the Fast Jet & Weapons Evaluation Unit of the Air Warfare Centre. In early February 2010 ZG503 was noted wearing code 'EB-Z' on the fin.