Thanks Blossom :-)
I have actually bought a similar thing, but it was from ebay. Maybe a silly move but it was only a tenner. I think it's a Kanger knockoff to be honest (the battery does have EVOD printed on it, but the clearomiser has nothing written on it), but it does have a removable head, so I've also bought a couple of replacements. I've not really used that one a lot yet but recoiling etc certainly sounds interesting.