Second university degree and need help.

I have a medical degree already from Cambridge but got sacked in a disability discrimination case which I won. Do not want to go back to medicine as it is tough with Asperger's as I do not have good communication skills.
Want to do a physics degree. Have been looking at Oxford and Manchester. Will probably go for Manchester as my son's dad cannot drive through disability and we both live in Manchester. If I move to Oxford it will make contact for my son more or less impossible and I think my ex has a right to see his son.
I can go for the gifted and talented scholarship at Manchester but that still leaves me £8000 a year to make up. I am a single mum to a 4 year old and so plan to make the rest up out of my disability living allowance and self employed tutoring wage.
Can someone advise if there is any other scholarships or grants? I do not want a grant from some big business as there may be a condition I have to work for them afterwards and I do not want to do that, I want to do a PhD then go into academia.