Thursday 17/12 about 21.40hrs.
Flew over Didcot and sounded like heading due North and loud enough to be under 3000' I would say.
Definitely turboprop not jet. and if was a Hercules they don't often fly directly overhead. Usually only stuff inbound to Kidlington go overhead that low heading north.
Will probably turn out to be a bog standard C130 into Brize Norton on a slightly unusual path?
Thanx for any info.