Think about what aspect of the subject interests her and go for somewhere which is known for that. If she is interested in mediaeval texts there is no point going somewhere where all the lecturers specialize in modern literature. Look at the specialisms of the lecturers. Years ago I knew someone whose interests at school were physical geography. She got a place at LSE and found that the economic geography which was the specialism there was not really what she had bargained for.
+1. I did physics, and, while even there some universities did a bit more thermodynamics/optics/other classical
Physics, and some a bit more relativity etc, and some certainly did more maths than others, unless you actually wanted to read astrophysics, basically a physics course was a physics course. My daughter, however, is doing English, and I am conscious of just how wide that subject is, and how frustrating it would be to spend half your first year learning old English so that you can read Beowulf in the original if all you really want to do is read plays about angry young men or whatever.
Having said that, I am a bit old fashioned; I liked that my physics course started with a solid if tedious grounding in the maths of physics, and I like that my daughter is going back to the foundations of English literature. It's not supposed to be easy though it would be nice if it were fun...