Forget, I was there at CY the same time
As for Edoms, the Bomber Controller bit was what came over the Bomber Box. Even though I must have put out tannoy's myself I have no recollection of the words I used - just pure mantra.
Similarly when actually on QRA we rarely heard the tannoy. The Ops O used to flip the tannoy on while the Bomber Controller was talking and we were off, usually before he got as far as Exercise . . .
ATC used to give us a clue as to the readiness state by firing a coloured very at the Q cars. One day they got a hit and the lead car at Cottesmore picked up a yellow very under the chasis.
I would have imagined that the only time it would have said "Coningsby Controller" would have been for a Groupex or some such.