Ahhh, UK...sorry I missed that, my apologies! Interesting that Duracell would make different-spec bodies for Euro market as opposed to the USA, though ...so odd this 9v issue!
Since Taylor now has a second "home" in Europe, perhaps try calling their factory service center there and ask them what's the most commonly available battery to get (yeah, what Dennis said
). After all, they've got to deal with all the local Taylors and must certainly replace more than a few of their customers' batteries.
Edward