Yes, Southern Ireland swapped to KPH just over 10 years ago. There was a time when I first moved here that speed limit signs were still in MPH, but road signs had distances in kilometers, which was strange.
Even though we're in KPH and kilometers, I still tend to automatically convert to miles because that's what I grew up with. Also, I have no idea what a good fuel consumption figure is in liters per 100km - MPG makes a lot more sense to me (once I remember that a US gallon is about 3.8 liters while a UK gallon is just over 4.5 liters).