Trees don't really fail to impress me, ever. This one (the big one at the back), at Bletchley Park, Milton Keynes, looks stunning and has seen some history. Bletchley Park is where Alan Turing et al deciphered the German Enigma machine encoding during the second world war. This tree was there before, during and after that event.
As I rode the bus down Camden Road, I wondered why almost everyone likes trees, and tried to imagine what London would look like without our friends, the trees. Pretty awful is my guess. I don't remember seeing so many trees in LA. They definately soften the concrete. I suppose winter is as close as you'd get to seeing London without trees. kinda.
Check out these tree facts at Trees for London.