Yes, they came *very* close to Kingston Hospital, rattled a few windows.
Couldn't actually see them though, only has a view east.
Assuming they came from Northolt(?) then crossing Kingston suggests they were heading south towards Gatwick/South Coast/English Channel.

I got sight of one of them from Tollworth, no 250kt below FL100 for these boys and going up with a truly impressive RoC south eastbound