Thanks for the replies everyone. Much appreciated. Not sure which authority to go with, more research required I guess. Magpie32, indeed it was your post I saw. Thank you for sharing the heads up, and the further info, extremely useful.
As a matter of interest, how many of you guys know UK licence holders who aren't too bothered about the whole thing? I've spoken to friends in both airline and corporate who said they have no intention of changing. I'm not sure I share their confidence in that. Most of the answers they give me range from "when I need to change, I will," to "They'll come up with a solution, not too worried," to "it's gonna cost me 1500 quid."