I have two requests. These would be ideal for a Cold War mod, but also look funky and that's a good enough reason as any
RAF Vulcan B1/B2(A~K) (Tactical bomber) - Looks a bit like a Concorde
This made up a significant part of the RAF nuclear deterrent during the cold war and became a symbol of power. It was Britain's last medium/large bomber. Used during the Falklands war from an airbase in Africa! Despite achieving it's military objectives in that war, it's greatest contribution may have been delivery of the psychological message "You are not out of range!". In a show of acrobatics during that same war, one outmaneuvred two Brazillian interceptors (a story in itself). First thumbnail shows a Vulcan participating with the Red Arrows acrobatic display team.
Google thumbnails BBC News Technical expert Line art diagrams
RAF/RN Buccaneer (Subsonic attack fighter) - Has a big bum
Originally constituted part of the naval surface attack wing designed to neutralise the threat of the large Soviet fleet. Following a reduction in the number of RN carriers, these fighters were transferred to the RAF for ground attack. They were deployed in NATO excercises and bypassed defences by flying under the radar band (similar to Tornado) and then managed to neutralise USAF interceptors. Never fired a shot in anger but they were brought out of retirement for Desert Storm and used in the laser designation role because they could absorb
huge amounts of damage from small arms fire at low altitude. Renowned for it's tough construction.
Google thumbnails Side-view showing extended rear end Line art diagrams
RAF Lightning (Supersonic air-superiority fighter) - Concept considered impractical
Oops... a third. I wasn't going to mention this one but it also fits the Cold War theme so I'm adding it in the interest of completion. Looks a little like a MiG-21 but chubbier and has two engines mounted vertically, plus funky wings. Very high maintenance costs. This was the first fighter aircraft to exceed Mach 1.0 without igniting afterburners which
some call supercruise. It may have been the fastest of it's era but a few Soviet fighters were unknown until after the Cold War so a lot of NATO assumptions were incorrect. British government intentionally thwarted export sales to stop it falling into the hands of rivals (i.e. Luftwaffe) thereby preventing it from being a commercial success and killing related hypersonic projects.
Google thumbnails Photo showing unique end Line art diagrams
Britain developed many other aircraft during the Cold War, some of which were more succesful or more radical but the ones mentioned above are rarer and therefore more interesting IMHO.