I have an LLB and used to work at the Law School of a Russell Group University.
Agree with what everyone else has posted: traditional subjects that she is interested in - no point in studying subjects she hates as she is unlikely to get the high grades required for entry.
I have standard grades (Scottish GCSEs) in English, Maths, Biology, Chemistry, Economics, French, Geography, History (and Drama - was actually advised to take this as was so shy - did no good though!)
Highers (scottish qualifications, lower than A levels but what is used for uni entry) in English, Maths, Chemistry, Economics, Geography, History and Modern Studies.
It was many moons ago that I applied to uni but I got in everywhere I applied with these subjects.