Last Sunday I had lunch with John Pym's ex (I have known the Oz family for many years) - and had the opportunity of course to refer to the pics/vid which have appeared on this thread.
Not only did she confirm that it was John on his last day on duty in Oman - she also said how angry she was that he did it - along with the other chaps. She was there watching and thought he could stuff it.
However, she also has a copy of the whole video which was produced and me and her brother-in-law are arguing why we should be allowed to make a copy.