You could've found an EU person to hold the domains for you btw.
Regardless, it's usually politically safest to put your domains under your own country's ccTLD. That way, you're exposed to one fewer country's dumb politics.
You could get jail time for hosting memes if you're in the UK no matter what domain you use. However, if you use a .me domain, then it can also be taken down for violating any law of Montenegro.
That would be .co.uk, so, jail time for hosting memes.