On 14 April 2021 the European Data Protection Board (EDPB) adopted two Opinions on the draft UK adequacy decisions.
It is not a done deal, but the report by the EU wide umbrella organisation for privacy protection seems to be one more significant hurdle cleared for EU-UK data flows.
There are two opinions since there are two draft adequacy decisions, one dealing with law enforcement and national security and the second dealing with more general data protection and data transfer matters.