I've had a look through the Sea Vixen site. The roll of honour mentions Lt R Eyton-Jones who was killed in 1962 - is he your uncle, or a cousin of your father, Anna?
Also mentioned on the roll of honour is the father of an old girlfriend - he was killed when she was six. I took her to lunch in the College one Sunday at Dartmouth, and in the Chapel she saw (I think for the first time) the memorial to her father. She married into the Navy, but I think her mum made sure it wasn't a flyer.