I did one but it was back in 1990. In those days all art colleges required a foundation course (or the BTEC National Diploma I did) - either a condensed 1 year course on top of your A-level or a two year course on top of your GCSEs.
This was because school art teaching was pretty poor in those days and many pupils just did not get a wide enough range of experience in 'mark making'*, technologies and art theory to be able to do a degree. I certainly didn't.
Whilst doing the foundation/BTEC course you got your hand held throughout the applying to art college procedures, which took place outside the UCAS system and were earlier than the UCAS admissions too. Despite doing fairly well I failed to get into art college to do a degree because the competition was very high. I was able to apply for a non-art course using the UCAS procedures because there was plenty of time left - I had got A-levels results already and so was accepted straight onto a course in Creative Writing instead which I did very well in.
I've said all this background stuff from long ago because it may still be fairly similar now - changes I can imagine have happened is that perhaps UCAS now covers the art colleges as well. Art colleges might accept A-level students if the teaching was good enough.
I would find your nearest art college (just for convenience) and ask them what students have to do nowadays. Your school may or may not be out of date. Also ask them about a portfolio - you may find that as well as showing off her textiles work, your daughter will need to show some curiosity about the world around her (life and still life drawing) and have tried different media. Perhaps done things in 2D and 2D. A good textile course will have covered that last one. They love BIG bold (A1) drawings and installations (photos of.) Or at least they did in 1990!
Having said that my portfolio was pathetic (a few pencil drawings and watercolour pictures of winsome pre-Raphaelite females) and I got in to do the BTEC. I loved the course although it was quite intense and a lot of work. I was struggling to catch up with students who had done more in school. I learned a huge lot and despite not getting into art college for a degree I still used what I've learned in my spare time ever since. It teaches you to how to analyse and create which are useful for even the most boring of office jobs.
mark making - oh please no don't call it drawing how dreadfully common*
** bobbins! Your daughter will have to put up with a lot of pretentious bobbins but it's worth it because it's fun!
Sorry that's so long! I hope your daughter has a brilliant time in college!
tl:dr? - Ask the art colleges direct!