Mil formation

[treadigraph]

Just had a pair of noisy contrails zip overhead Croydon in a NE direction. Managed to get the binos and have a look - think they may have been F-15s but a bit too gloomy to be sure. Anyone confirm what they were please?

[kcockayne]

I thought that you were referring to Russian helicopters, at first !

[treadigraph]

Russian? Well, they were going quite fast... Boom boom...!