Despite leaving the EU, the UK retains the GDPR in domestic law. This is called UK GDPR and it sits alongside the Data Protection Act 2018 at the forefront of the UK’s data privacy laws.
One difference is that whilst the original GDPR concerned the processing of EU citizen data, the UK GDPR concerns the processing of UK citizen data. There are also implications concerning the processing and transferring of data across borders that business should ensure they are familiar with.