Can anyone identify this unusual aircraft?

Flying over London, England not far from Northolt semi-military airport.. It's RAF, I believe, and it looks as though it's built to fly high with those narrow wings and extra control surfaces. So probably a spy-in-the-sky aircraft. http://imgur.com/WmXaL.jpg Sorry, it's a bit blurry...it was so loud... show more Flying over London, England not far from Northolt semi-military airport..
It's RAF, I believe, and it looks as though it's built to fly high with those narrow wings and extra control surfaces. So probably a spy-in-the-sky aircraft.
http://imgur.com/WmXaL.jpg
Sorry, it's a bit blurry...it was so loud that I thought it was just one of the commuter helicopters that come over at various times and I was slow to react :-)
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