I appreciate this might not be the answer you're looking for, but I have seen on the internet that Oxford and Cambridge do have lovely libraries. I have a feeling that Durham and Exeter libraries are nice as well.
two libraries i love off the top of my head are the maughan library (kcl) and the john rylands library (uni of manchester). most unis do have nice libraries, so i wouldn't put too much thought into finding a uni with the library of you dreams.
two libraries i love off the top of my head are the maughan library (kcl) and the john rylands library (uni of manchester). most unis do have nice libraries, so i wouldn't put too much thought into finding a uni with the library of you dreams.