UK finance here. Several billion goes through our platform.
We've already moved company registration offshore in case the shit goes down. We're about ready to move all our kit out of the country as well.
As for staff, we're staying put because when everything else goes down the shitter, we're going to be in the last position of power financially. House time.
Edit: Also EU safe harbour; fucking joke if there ever was one.
We love tech and finance companies (most major international ones work here), have a sensible attitude to terrorism related issues (we have a bit of a past history), part of the Euro, long-term plans to stay in the EU, don't force backdoors or intimidation of large companies, stable politically, neutral foreign policy, easy enough to get high-skilled visas.
Great place to work, cool people, English speaking, 12.5% Corporation tax, good grants, good beer and music.
Find out more: www.idaireland.com :)