When on 1 Sqn in the mid/late 60s, we got an ex Boscombe Down FGA9, XF442. It was a real gas guzzler, we soon found, to the extent that it was almost always programmed as a formation leader's aircraft. We never found out why; engine changes made no difference, and all the rigging seemed OK. Apart from the guzzling, it flew well - and, oh yes, after April 68 it had a small replica of Tower Bridge stencilled just below the port cockpit rail. It followed me out to 8 Sqn and was still a gas guzzler, maybe 5% more than the others.