For the first time in 50 years, two Avro Lancaster WW2 heavy bombers flew information over England yesterday, accompanied by a Spitfire and a Hurricane.
The two Lancasters, the British equivalent of a B17 Super Fortress, are the last airworthy examples in existence.
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The Lancaster is powered by 4 Rolls Royce Merlin Engines, which have a very distinctive sound, which I wrote about here, and were the planes used in the famous Dambuster bombing raid on the Ruhr dams in 1943 (diary here)
A fuller account of the event can be found on the BBC and at the Daily Mail
Update. for any Brits out there, here is the programme of displays for these planes. This will be your last ever chance to see two Lancasters together in the air.