To be fair it wasn't default. It was just blue while the other was grey. I found the process to be quite easy however at the end the had "see my other options" in grey writing and I accidentally clicked away before I saw it so they certainly abuse dark patterns.

The "see my other options" link at the end leads to a page that explains that there's no way to use Facebook without consenting to the requests on the last page, gives you a button to download all your data and one to delete your account.

Overall, I found the UI pretty good, the buttons for the alternatives (non-consent) were clearly labeled, and they explained well what they were going to do with the data.

Yeah thats what i meant. The coloured in button to catch your eye if you're in a hurry. I was quite surprised to see being asked for such things. Whether that actually makes a difference or not i guess we'll never know.

So I guess we can expect to be asked this once a week in an increasingly deceptive way until people either by accident click yes or they click yes just to get rid of the popup.

Does GDPR apply in the UK post-Brexit?

Yes, it’s already been passed into uk law

If UK participates in EHP Norway-style, then yes.

We've got at least a year before that happens.