London Mil, as I do the DTY sector almost day in day out then military traffic is pretty much the norm going through that sector so I'm pretty used to seeing it.
Scaremongering? Don't think so, but I can also recall an incident a few years ago now with a russian tanker and 3 chicks which were all supposed to be at the same level going west into fairford, but, the chicks were a few hundred feet lower than the mother and got very close to a gatwick inbound going south.
I think UK formations are no problem but our foreign 'friends' ?