[jon-wood]

While come January the UK won't be part of the EEA, at least initially GDPR will continue to apply as most EU law has been grandfathered into UK law post-transition.

[pjc50]

Yes, but as far as I'm aware the question of whether the UK will be a "third country" for purposes of data transfer outside the EU after January 1 is still undecided?

(Where is Facebook's data center anyway, is it Ireland?)

[fnord123]

Forest City, North Carolina; Altoona, Iowa; Fort Worth, Texas; Los Lunas, New Mexico; Clonee, Ireland; Lulea, Sweden; and Odense, Denmark