Where a drama school is a registered provider with the Office for Students, and is running courses at first degree level, their students are eligible for the same funding (i.e. student loans) that all other under-graduate students are. However, instead of applying through UCAS, applications to drama schools are made directly through auditions.
Many of the UK's leading drama schools have come together to form the Federation of Drama Schools. Information about the courses offered by FDS institutions can be found here:
https://www.federationofdramaschools.co.uk/studying-at-an-fds-school/choosing-your-drama-school
There are other drama schools, that are not FDS members, that are worth considering as well. See here:
https://howtodrama.com/accredited-drama-schools-uk/
>>> But we don’t live in London and there are none on the south coast
I can't really see what that's got o do with it. Back in my teaching days, when I was advising 6th form students about their future studies I always told them that they should never consider anywhere within easy travelling distance of their parents' home. (I usually suggested an absolute minimum distance of 100 miles from home). If students are to get the best out of the social side of their lives they need to be where they're not tempted (or pressurised) to return home at weekends. So your daughter ought to be looking at cities such as Birmingham or Manchester for her studies, rather than staying close to home.