I brought my own in a couple of years back.. simply go buy it , bring it in via hollyhead, just drive it across to home as normal, then the fun starts, you gotta register it, and pay VRT, which will be appro 24% of the value that the revenue in ireland will put on the car. Their web site is full of info and a calculated to estimate the registration costs.. it' all a bit tricky but worth it of you get a bargain on the UK.