'Hamish ?' might Hamish Cormack.
Finn Gordon initials DFM, which probably had some amusing uses
Jim Cheatham, David Collinson, Dick Holmes and so it goes on.
About a decade ago, I asked the then RN commandant at DHFS if I could have the course photos so as to compile a book, similar to a couple produced by Gordon Moulds for the Lightning and Phantom OCUs and sold for service charities. In his response he declined saying helicopter pilots were now guaranteed privacy - next day, TV had a lengthy interview with one of those!!
Old Duffer