27 October 1974; investigation and regression documented by 1978 / T119
Aveley: a family journey, green mist, and later regression
Near Aveley / Upminster, Essex, England

Witness account
An Aveley family described a following light, radio trouble, green mist and an unexpectedly late arrival. The father's later hypnosis produced an account of beings and examinations inside a craft.
Public record
Collins documented the investigation by 1978. Day and Avis are names used for the same family. The cited account says the wife initially declined hypnosis and the child was not hypnotized.