Overall a good answer, however there is something to add. For British students, once you turn twenty-one you no longer have the same strict entry requirements,

Overall a good answer, however there is something to add. For British students, once you turn twenty-one you no longer have the same strict entry requirements, instead it's more a case of proving that you're the kind of person they want than showing what exams you've passed. (Though they're likely to ask you to do some studying before applying, to demonstrate that you're willing/able to learn.) Most likely the same for international 'mature students' as well.