Concorde was tested up and down over the Irish Sea so my home town of Donaghadee was regularly hit by the sonic boom of a plane that was so high it could not be seen.

I was working at Heathrow in 1976 when it made the first commercial flight. the airport must have come to a standstill as most of the staff were out on the tramac to see it take off. Then I had the experience of hearing it pass over the roof of my house on the LHR flightpath twice a day.