try Kaplan. I think that some people who have done AAT through Premier have sat their exams at Kaplan centres.
Not something that I've done myself so hoping hat someone who has also answers yoiu post,
HTH,
Shaun.
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Shaun
Responses are not meant as a substitute for professional advice. Answers are intended as outline only the advice of a qualified professional with access to all relevant information should be sought before acting on any response given.