I was duty operations controller at Waddo at the time. I was in bed, in the duty bunk at the mess, listening to the radio when I heard the announcement of an air crash.
I rang the duty ops officer as we had aircraft up and he checked our jets and at the same time called 1 Gp Ops who were in the dark too.
They called 3 Gp who then found out it was a Marham Victor.
I don't know about the timings at the Watton end but the BBC was the first we knew at the Ops end.
I may have some primary data. I will check Monday.