.. it might help if you post the backlink to here, to give your story a bit of colour. I never knew Colin, but I served on a Puma Sqn so I knew of him, and the accident. Your photograph has the look and feel of one from decades before, the captured looks, the goofing around and the stories behind the people - time passes, but nothing really changes eh?
Per Ardua, and I hope you find out lots.