Unfortunately, it appears that the fad for native plants of the 1990s has caused the staff at Kew to at least plan to destroy the tree and plant something native to England there instead. As far as I'm concerned, this sucks. Trees that old and beautiful are worth saving, I'd think, and frankly, if you want to see native English trees, there are thousands of other places where you could do that within two hours' journey.
Anyhow, the flight to Tbilisi leaves in about six hours, and I need to get back to the Pratt flat quickly, throw my crap in a bag, stash my cash under my trousers, and hit the road. (As is common, there appear to be massive delays on many Tube lines due to signaling and switching problems at some of the larger stations in the area. Sigh.)