They were covered by EU law though...British banks were already covered under the depositor protection scheme though.
People depositing in a bank outside the EU, not covered by depositor protection, and in a country with the GDP of my local chip shop were very stupid indeed.
It's a statutory requirement to comply with EU banking regulations to offer banking products in the EEA, regardless of where the parent company is based. One of which is that the deposits are protected by an insurance scheme.