Have always had to get a three year UK license. But they don't charge me for it, and it's the handy credit card sized thing that you can actually carry around with you (unless your hiring a car when you need the paper part as well).
Was surprised when I got the Irish license and they asked far less details, I think it was just a note from a GP that I walked in to the office with, girl at the desk didn't even look at it, and just gave me a 10 year license. No actual checking of the medical details as far as I could see. That was some years ago though and I never bothered renewing it after that.