RAF Typhoons were scrambled today to intercept an Antonov 26 that lost comms, triggering a sonic boom over London.
The flight was escorted to Stansted airport, and the answer at What's the point in escorting a threatened flight with two fighter jets?What's the point in escorting a threatened flight with two fighter jets? says they "guide" the rogue jet to the airport.
How do they actually do this? Once they've established the jet is not a threat, how do they communicate with the other pilots?
I have an image in my head of them writing ← 120°
(etc.) on a little whiteboard :P