It was once almost a foregone conclusion that the UK would comply with EU data protection law enshrined in GDPR after the Brexit transition agreement ends on 31 December 2020.
Some people might have thought that but that would have left the ECJ as the ultimate arbiter. Add to this the list of donors to the Tory Party who are desperate to dispense with things like personal privacy, and it was obvious that the UK would try and offer a sop. Won't help though because ECJ's judgements have been clear and consistent on this and it's not as if the UK has anything like the same kind of bargaining power as the US when it comes to proposing fudges. EU companies will not want to risk the potential fines and will definitely seek to move data processing out of the UK, if they're not already doing so.