Wow, your daughter is amazing, actually incredible... She is very, very far from stupid She is capable and as strong as steel to get those grades and only have mild OCD - your daughter deserves massive support and as far as I can see seems to be given no acknowledgement.
I can see you are overwhelmed. Are the school aware of the situation? Someone, including the social worker, should be massively championing her. A quick google:
'No, young carers do not need to receive Carer's Allowance to be considered a young carer for university applications or additional help. Most full-time university students cannot even claim Carer's Allowance, so universities rely on alternative proof like a GP letter, school reference, or local carer service.
UCAS and University Applications
UCAS tick-box: You can indicate that you have caring responsibilities in your UCAS application without needing any benefit claim.
Contextual offers: Universities use this disclosure to understand your circumstances and may offer lower entry grades or extra support.
Verification: Instead of Carer's Allowance proof, universities usually accept a signed letter from a teacher, GP, social worker, or local young carers project.
Types of Support Available
Bursaries: Many universities offer dedicated young carer bursaries or cash awards independent of government benefits.
Practical help: This can include early choice of accommodation, library perks, or a designated contact person.
Student Finance: You may get extra consideration through your regional student finance body, though it is assessed based on household income and status rather than Carer's Allowance.
Also - she should get a contextual offer next year from Uni of Manchester (she should call the Uni and discuss with them now). Should she decide to take a year out she could maybe resit the C and get work or work-experience in something connected to the law:
www.manchester.ac.uk/study/undergraduate/applying/contextual-admissions/your-data/
Also - ask to see her A-Level scripts and let your daughter go through them with her teachers to see if re-marks might be appropriate.
A quick google says MMU has very good links with great law firms if she decides to go this year. Maybe they would be a supportive choice and she should shine. I'm sure, given half a chance to concentrate on her course you DD would do very well anywhere... But she needs to be given half a chance and, as incredibly difficult as your situation is, you need to ensure she puts herself first.
I so, so feel for your wonderful daughter. She was eligible for so many boosts and still is (Uni taster residentials including Oxbridge - was she aware? Did she get a chance to take any up? If not I am actually incredulous that no one supported her more whilst she was supporting everyone else. Please, please ensure she has access to all the help she so deserves).
And if your daughter is reading this - please ask and seek out all help. Make an appointment to speak to your Head Master/Mistress, your school I'm sure would pull out all the stops for you if they knew ... are they aware? I can only assume they are not.
All very best