Brexit didn't change anything OK, but I guess it's too early to find out/know what's gonna happen. Will the situation remain the same in 2 years or so once the Brexit is "done"?.
I live in USA but I lived in UK for a couple of years and I love it (European passport/Soon US citizen). It'd be a shame not being able to apply for any british airline in the future, although I guess that's exactly what's gonna happen.