It depends on what you’re looking for, but I would advise against bringing a girl from back home to the UK because you feel like you can’t find someone locally (Eastern European or otherwise) should you decide to stay.

Have seen many scenarios where people were used by a partner that used them as a springboard to acquire residency or citizenship of another country before abandoning them. YMMV but I’ve even seen cases where someone was already in a place they want to be, but they have a lot of difficulty acquiring a more permanent situation themselves so they find a partner who does have that.

There will probably be some prejudices towards you but I suggest focusing on the people who aren’t biased that way instead of the unfairness of the situation.