Sorry – guilty of slipping off-topic with my original post with the Youtube Vids 😮
Never implied they were of the Severn rail bridge – I was watching a clip of the demolition of the correct bridge and found those other clips on the sidebar, and got kind of sucked into the whole ‘flying under bridges’ thing…

Regarding the Clifton Suspension Bridge incident – I was told about that as a child when being driven past the precise spot where it went in… as my grandfather was on 501 Sqn at the time 🙁