It will depend on the law. Tax law favours a designated location for residency, for example. The GDPR doesn't even operate on the level of residency (at least

It will depend on the law. Tax law favours a designated location for residency, for example. The GDPR doesn't even operate on the level of residency (at least for data subjects). You're covered by the GDPR when you're physically in an EU member state[0] as regards your activity in that member state or if the data controller/processor is established in the EU. The UK GDPR will be the same, mutatis mutandis. [0] Or somewhere where EU law applies by virtue of international law, like an embassy, an EU-flagged ship, an area of Antarctica claimed by an EU member state etc. etc.