While the General Data Protection Regulation (GDPR) is being put forward by the three European regulatory bodies, it will still apply to the UK during the Brexit negotiations and implementation period. Therefore, it is an Organisation’s responsibility to ensure they are “GDPR ready” even though the UK is leaving the European Union.
However, many Organisations may worry about how freely data can be transferred post-Brexit. I believe there is a simple answer to this. The sharper an organisation integrates GDPR into the regulatory stature of the organisation, the easier they should find it to transfer data with the EU once the United Kingdom has relinquished its membership.