Britains Ministry of Defence holds video surveillance footage of Gaza from the day that Israel killed seven international aid workers but is refusing to publish the tape.
Among those killed in the World Central Kitchen convoy on 1 April were three British military veterans: John Chapman, James Kirby and James Jim Henderson.
The footage was taken by a Royal Air Force (RAF) surveillance plane which spent approximately five hours above Gaza that day.
It seemingly returned to base in Cyprus minutes before the airstrikes were launched.
The RAF may therefore have collected footage of events leading up to the tragedy, which could provide clarity over Israeli claims that Hamas gunmen were seen near the convoy.