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Lakenheath/ Bentwaters UFO Incident 1956 - Dr. David Clarke
The incident involved a series of radar and visual contacts with unidentified flying objects over airbases in eastern England on the night of 13–14 August 1956, involving personnel from the Royal Air Force (RAF) and the United States Air Force (USAF). Radar operators at the base tracked a target, appearing similar to a normal aircraft return, approaching the base from the sea at an apparent speed of several thousand miles per hour. They also tracked a group of targets moving slowly to the north-east which merged into a single very large return (several times the strength of that from a B-36) before moving off the scope to the north, as well as a further rapid target proceeding from east to west. David has interviewed three RAF servicemen who were involved with the incident and in this video we will play some of the testimony for the first time ever.
See more (external link) 
https://www.youtube.com/watch?v=kWxvCEyIjro&t=1s