I found these...
http://www.sussex.ac.uk/si/1-2.html
Only a module -
http://www.icslearn.co.uk/distance-learning-de gree/health-social-care-degrees/ba-social-care /legal-contexts/
I did a law degree and haven't heard of many social care options. I'd try and find unis that do both law and social care separately and ask them to see if it is a possible degree combination esp timetable wise. It might not be the legal aspects of social care you want though and "law and social care" if offered may be restricted to say one module.
To get a qualifying law degree, in order to study further to practice you have to pass all the core modules which make up a large part of the degree with space for chosen electives to make up the degree points requirement.
You could always do a law degree then a master specialising in social care law though the academic part is very dfferent to life in practive so on the job training and experience may be more beneficial.
If you are more interested in the social care aspect as a career rather then legal practice then some social care degrees may run modules on the law relating to this and it may be possible to take some law electives.
Distance learning may be more flexible and you could speak to people like the Open University.