Just for the record the only 'Army' gazelles with SAS
No they weren't
We had SAS fitted to 3 Gazelles in Berlin in the early 80s also it was fitted to both the aircraft we used in Canada in 85 all Army. I had the frightening pleasure of being in the left seat when a colleague tried to go low level over the training area using the SAS but forgot we had a load on an 8ft strop under the aircraft.