Thank you Max and Pip
I've just noticed there's a ruddy great chunk out of it at the top middle :x Why didn't I notice it before! I still like it though.

Flick, I can't tell you the number of times I've bought something only to get it home and find a huge chip or crack running through it. Hubby (who's got a much sharper eye for damage than I have) now has to have the quick once over on any glass I want to buy! Still, as you say, it doesn't notice on your particular piece - and unless you want to sell it on it's unimportant from a display point of view.