Government and Personal Data
Offshoring of Government data (that is any data held by Gov Depts being) has been fairly strictly controlled to a few countries. If memory serves me right it doesn't like any data going outside the EEA.
So I wonder if the Cabinet Office OGSIRO has issued a missive to Depts to ask which of them still us Google services. It wasn't all that long ago that some *large* ones did.
See also https://ico.org.uk/about-the-ico/news-and-events/news-and-blogs/2020/01/statement-on-data-protection-and-brexit-implementation-what-you-need-to-do/
and
https://ec.europa.eu/info/law/law-topic/data-protection/international-dimension-data-protection/brexit_en