Did anyone else just hear a sonic boom? Heard all the way from Saffron Walden to Waltham Abbey as far as I can tell!
There is a QRA notification but no further information provided at this time.
EDIT: Bunch of RRR assets up on flightradar24 so probably in support of something.
What does any of this mean, Rroff? I'm completely ignorant on all this sort of stuff.

Cheers, fella!Few RAF trainer stuff up as well (Pirate13, etc.) so could be an exercise.
Quick reaction stuff usually sent up to intercept/shadow other countries military aircraft if they are approaching or transiting near our airspace without prior agreement or if a civil aircraft does something unexpected like a passenger plane that loses contact, etc.
The RRR stuff is general RAF assets in this case stuff like tankers which might be supporting fighter aircraft in case they need to stay up for some time.
Was just going to post ZK357 looks to be the culprit according to Planefinder.
It was a Eurofighter heading down from Coningsby towards the Channel, 40000ft, 1200mph. Disappeared off freedar now.