So, G-WAAN is Ser No 20 built in 71/72. The German Army didn't order 105s until 1977 so the BBC were incorrect about it's history.
G-AZOR is/was a 105D. The German army operated 105C's, I believe, well before 1977. The D spec. was for British CAA requirements.
I believe the aircraft used in the film North Sea Hijack was G-AZTI. These two aircraft were, I think, the first 105s operated by Management Aviation. The bomb in question was collected from the platform's stores department. It is a little-known fact that all offshore oil/gas installations keep a selection of bombs for such purposes.
