VERY nice,
warmtoast 
Memories of the Akeroyd Board (invented by [subsequently] Gp Capt Stubby Akeroyd) where the Local controller moved those devilishly sharp map pins, with c/s on them, around the pin-board with the diagram of the circuit pattern ... which was then repeated in lights on a circuit diagram in the darkened Approach room.
Having stabbed myself endlessly with those bloody (literally) pins in Local, I confess I hardly ever bothered to look up at the Approach repeater display. GCA had priority anyway, and the circuit state was given when they overshot/rolled and went to Local. It must have had some use, at some locations, but it eluded me!