(I'm a regular education poster, but namechanged in order to be more frank. Feel free to pm me if you want.)
Lobster - my dc is in their 2nd year at Oxford doing Classics, on the no-Latin-or-Greek option (although they did in fact do Latin AS very casually in y13 after dropping it after GCSE, but they're quite crap at it (got a D at AS)). Although the uni are encouraging before application, as a faculty, they're not brilliantly supportive afterwards and actually the numbers without the language A levels are very small. Dc's college are better than some for support for the ab initios. I saw dc last night - they are choosing Greats modules atm and without Greek their choices are much restricted, there are no options to study anything Greek in translation, and there are about twice as many Greek options as Latin, so they're all about the Romans and whatever other random modules they can choose to keep the amount of Latin to a minimum! They can do some Logic which might appeal to your dd if she is good at Maths (my dc has enjoyed it and will do more). The Classics dept are not as up to date as others in terms of getting lectures online and so on, which would be really useful for my dc. We were discussing last night how much easier their studies would be if dc had gone to their insurance (Leeds), where any languages would be entirely optional! That said, dc loves their college, loves being in Oxford, and doesn't look like they're going to fail Mods, so atm all is well and dc is happy 
cowgirls all colleges should have a Disabilities Tutor (or similar name) which would be your dc's first port of call. You could contact a few before application to get some info/an impression of helpfulness. My dc has been diagnosed with ADHD (and a touch of dyslexia - probably hence the crapness at Latin!) in the last year - an educational diagnosis only, which means no drugs, lol, but does mean dc can apply for DSA. My dc had gone to the GP first but was told there would probably be an 18 month wait for the medical diagnosis process to start, but got this done very quickly through the university disability service, and there are various adjustments for exams that can be made if desired. Having had no experience of sen stuff before, just hearing people's frustrated stories about schools, I've been pretty impressed with it all.