I witnessed 'a big aeroplane with 6 propellors at the back' (don't remember a Meteor escort though); from my home in Chesham in the '50s, I suppose I was about 5 years old. It was heading towards Bovingdon.
I ran indoors and told my older brother who hit me as he was in Germains School ATC and thus knew everything about planes and there was no such plane in England!