In most countries, in the EU, deposit insurance is provided on the first 100,000 EUR or local currency equivalent.
In the UK, the first 85,000 GBP (slightly over 100,000 EUR) is protected by the FSCS. This effects Irish savers with Investec, Nationwide UK (Ireland) and Leeds Building Society Ireland.
This, if implemented, will give Investec, Nationwide UK (Ireland) and Leeds Building Society Ireland a competitive advantage over the other Irish banks.
Interesting that the FCSC will have two deposit insurance levels. One for 'temporarily deposited money' in addition to the normal guarantee. It will be interesting to see the finer detail on the the six-month temporary guarantee.