It will be declared illegal at short order
It will be declared in violation of the ECHR and various Eu regs on short order. Popcorn please.
The EU-US Privacy Shield agreement has been agreed by representatives of the EU's Member States. Privacy Shield was constructed as a replacement for the Safe Harbor agreement which covered the transfer of EU citizens' data to the US. Safe Harbor collapsed following legal action spurred by the Snowden revelations, which …
Not to mention that, if the government is dumb enough to plough on with brexit, I'm sure that away from the influence of the EU they in charge will care approximately dick all about our privacy. Look at what they already tried to pull regarding medical information...