Retained by Hawker Siddeley as a developmental test aircraft and also used by Rolls-Royce for evaluation at Filton, this is the oldest actual Harrier existing (ie not counting its predecessors, the P.1127 and Kestrel). By the late 1980s it had a GR.3 nose fitted and was transferred to the Royal Navy as a ground handling trainer, hence the tail marks it still carries.