This is possible now that Brexit has happened. Whether the UK will need to comply with GDPR or not is dependent on the deal Boris strikes with the EU, if indeed he ever does.
Most EU laws are getting grandfathered in post Brexit, but the UK reserves the right to change them whenever they want. In essence, they've branched off their legal code from the EU bramch and can now commit changes to their orivate UK-only branch.
GDPR rights will most likely get eroded in the UK.
https://ico.org.uk/for-organisations/data-protection-at-the-...