Originally Posted by
SpringHeeledJack
Weren't there sonic boom trials by RAF Lightnings over the London area to see how possible Concorde booms might affect the populace, somewhere in the 60's ?
Summer of '68 there was one. Hot day and I heard what I thought was a distant boom of thunder, then when I met the late Honey Monster that evening at the ATC Squadon, he asked if anyone heard it. He was already an ATCO at Farnborough and it was Farnborough's Lightning on that occasion starting over Reading and heading east..
Otherwise overland 'booms' were banned apart from one specific area used by RAE Bedford; the Bedford Levels. It was still notified in the Bedford Flying Order Book until the day they closed in the '90s