The police reported the sighting to the coastguard, which in turn alerted ships in the North Sea, where a crew reported seeing more UFOs. Simultaneously, an unidentified blip was picked up on radar over Boston. Also included in the latest release is a letter from senior MoD official Ralph Noyes, in which he describes seeing a film of UFOs captured by RAF fighter pilots in 1956. Mr Noyes claims the footage was shown at a secret underground screening arranged for air defence staff at the MoD in 1970.