Trident Reverse
Ahh - I had forgotten about that. You could actually use reverse at any altitude and so, with full airbrake as well, and despite residual power on number 2 engine, achieve huge rates of descent. The use of reverse in the flair was recommended for very short runways as the brakes were not great. I remember Edinburgh before it got extended and Gibraltar, but, as these were always Captain's landings I never did try it myself. I also happen to know that it often frighten the passengers at the back!