Originally Posted by
Fly-by-Wife
Curious one - I saw what looked and sounded like a SEP (I really don't think it was a turbine) passing overhead Richmond (west London) at about 5.20 this afternoon, roughly SW to NE, estimate around 3000 feet. Given the built up area and the London TMA, a very unusual sight - a couple of other people also noticed the odd sound and wondered what it was.
Looking at an ADSB Exchange playback, the only aircraft likely was G-BYEM Cessna 182 [Denham based] that crossed the area in your stated direction at 4900 ft @ 16.35Z [so 17.35 local]
https://globe.adsbexchange.com/?repl....270&zoom=12.4