The photographs are courtesy of Stuart Mitchell, Peebles area, who formerly worked at Glentress Forest.
The photograph is headed as helicopter training which could refer to period around the late 1980s when short courses were held to give Forestry Commission fire fighting staff and sometimes members of local fire brigades experience of loading into and unloading from helicopters to attend fires at remote locations on the hilltops. Usually some equipment such as fire beaters and knapsack sprayers had to be taken on board as well which was always difficult with the down drafts and noise of the blades above the head. At all the times it had to be remembered NOT to lift the beater above the head and hit the fast moving helicopter blades!
Stuart as a front seat or side ‘door’ passenger (actually no doors as they were usually taken off to allow the fire beaters on board across the foot well) had a good view and able to use his camera for this and the view in the attached PDF.