https://phys.org/news/2018-05-eu-effect.html

Even though the rules were officially adopted two years ago, with a grace period until now to adapt to them, companies have been slow to act, resulting in a last-minute scramble this week.

Britain's data protection watchdog, the Information Commissioner's Office (ICO), said that its site had experienced "a few interruptions" as the deadline loomed, but said that "everything is working now".