Perhaps you are confusing Ireland with Iceland? (seems improbable since you work in Ireland) Even then, Finland is colder than either of them although its coldest parts are not so easily accessible.
(Like at my home, the council built a fibre to a nearby facility, but I can't plug into a fibre as it passes the house on the nearby street, underground...)
Google has also set up a data center in Finland, where it indeed is colder; this one recycles a former paper mill and its energy connections. http://www.google.com/about/datacenters/inside/locations/ham...
> Well, one of the big advantages of Ireland is that it's the coldest country in Europe with a decent amount of transatlantic fibre running by its coast
It's the fibre that's the key bit there.