John Haynes was one of 25 people killed in the 1994 Mull of Kintyre Chinook crash. He was serving in the Northern Ireland Office, possibly as an MI5 officer, at the time of his death. Haynes was a retired Major in the Intelligence Corps.
- The Mull of Kintyre Disaster: The Victims: D-notice issued as names of civilian victims disclosed, Independent, 4 June 1994.
- Vivek Chaudhary, MI5 HONOURS FIVE MEMBERS KILLED IN AIR CRASH, Guardian, 7 September 1994.