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.
https://ico.org.uk/for-organisations/data-protection-at-the-...
That said, apparently they've just reached a deal, and the transition period ends in 7 days, so lets see what they decided about with data protection.
GDPR rights will most likely get eroded in the UK.