Theresa May is a politician, who became the priminister of the kingdom (which is more conflicted than united) in the fall of '16, after the last guy walked out of office because of how gutted he was to hear that the people had voted to leave. So what? is it really such a big deal if a country doesn't want to be united with europe for whatever reason?
Her birthday is actually held in October, rather than May. Look it up if you wanna!