With a Maths / Bio combination there are a wide range of Biological Sciences open to you - Biological sciences, Neuroscience, Psychology, Plant Science, Zoology, Nursing, Marine Science, Ecology etc
Maths - Economics, Business, Marketing, Data Science, Maths & Stats etc,
History is a solid essay-based subject and many Humanities / Social Science degrees will not require any specific subjects - Politics, Sociology, Law, History or History of Art, Liberal Arts, Liberal Arts & Sciences, American Studies, Geography, Philosophy, Classical Studies, Teaching etc etc
Have a look down this degree subject list and look at the individual course pages to see the required subjects - some will surprise you!
https://www.sussex.ac.uk/study/undergraduate/