The second person lives in Britain. I wonder if he tried submitting a GDPR request, and if Google has any obligation to keep the data, or if they delete it immediately?
If they want a full access to the EU market they will have to use the EU regulations like Norway does. However they may prefer a hard brexit for some reasons.
The GDPR regulation is implemented into British law as the Data Protection Act 2018 [1]. It must remain until the end of the year. If there's "no deal" then, next year, the UK Parliament may repeal or modify it as it wishes.
However, there were data protection acts in 1998 and 1984, and it seems unlikely the general principle of access to personal data -- which was there before GDPR -- would be removed.
