Leon,
I remember that night well! I was the JEngO and was in Ops chewing the fat with our Auth (who was the Sqn XO and also covering DCF) about the following day's flypro when I took the phone call:
"Waddo SATCO here, one of your Tonkas has just bombed my runway!"
"How do you know?"
"Theres bits of 3Kg practice bomb everywhere"
At this point, I handed the phone to the Sqn Ldr and left him to it, especially it was another Sqn.......