Try a good university and look at their entry requirements! I've had a quick look at one university that i know does animation and this is their entry requirement
"Students of all ages and all social backgrounds are recruited. Applicants demonstrating commitment to and knowledge of the subject on their application form are invited to a recruitment session, where they will be required to present a collection of their creative work. The emphasis should be on quality rather than quantity and applicants may wish to include samples from a range of disciplines. However, evidence of an interest in Film and Animation studies should be included, demonstrating work composed and framed for a screen or TV format such as evidence of storyboarding and sequencing of narrative. Also required are relevant sketchbooks, a variety of drawing approaches, design and samples of written work."
It has a minimum of 240 tarriff points. This changes from university to university though so you'd have to look at each one. This is of course if you take the university option 