I'm studying in Romania at the moment as well, it's a lot easier to get in than the UK believe me I tried! In terms of BREXIT a lot of things are happening and the only way to be sure is to give it some time. Apart from that we will end up doing a UKMLA exam, I think in 2023. In terms of getting your certificate from the GMC it shouldn't be an issue since everyone will end up doing the exam. Of course I'm going to be biased and say Romania seems to be the better choice, at least for me! I would try and get more student's opinions and maybe even visit the places you wish to study. I came here to Craiova well before I applied just to get a good look at the place and see if it was the university for me. I also applied to Varna but for me I wasn't that much of a sun and surf beach person so I decided on Craiova instead, the brit in me didn't like the sun I suppose.