Watched 2 UKTORF3 decide to 'embellish' Concorde in the Bristol Channel (as she was starting her run) - all cleared through the Sector Chief - can't remember what the coordination was, not that it mattered. A better demonstration of Target Lead I have never seen since!
On the more recent side 2 FA2 Sea Harriers were asked to intercept an airliner a week or so post 9/11 over Southern UK. They were on a training flight and London Mil asked if they could close said airliner. No dramas, get a position (suspect Lon Mil didn't have a Bullseye in force), find it on radar, close it....say, how close do you want us to get? "How close can you get?" Needless to say the pilots were a little surprised to see two pointy grey things appearing from under the nose!
Nice to see that the next day, the papers reported that 2 RAF Harriers had intercepted an airliner..........
Not at FL350 and M0.85 they sodding didn't!