LSE, Heriot-Watts, Bayes Business School for actuarial science degree. Although, I would advise against doing a pure actuarial science degree. Although you get some exemptions, it narrows job opportunities a lot and if you change your mind on becoming an actuary, then there was no point in doing the degree.
I advise you take a pure maths/ maths and statistics degree and take the actuary exams after.