I was brought up in the same area (Lytchett Minster), and had a brother who was on 30 Sqn at one time. There was a low level route across Dorset that was in regular use - often saw Fat Alberts myself from the late 60's onwards. The OCU was at Thorney Island ISTR, plus Fairford as well as Lyneham hosted Sqns - they eventually all moved to Lyneham.
I think it was busiest when Salisbury Plain was being used for exercises.