was not this an ET Type Yank thing flying around a Scottish Airfield so the storys went HYPERSONIC UFO style . GOOGLE has plenty#
Aurora Project Hypersonic Aircraft
and on UTUBE
YouTube - Project Aurora - The Flying Triangle UFO?
One story had an Airfield that disappeared under ground after every
flight NO doubt swept by Nessie near Macrenhenish
so over to the Experts
Tony