As a student in Birmingham you are entitled to join and borrow from one of the UK's largest music libraries.Before going it is worth using their catalogue to check that they have what you want although it does not appear to list everything which they hold.
UnderScore is a musicology blog about the making of critical editions and about what those editions can reveal. Readers include musicologists, music editors, early music specialists, linguists, and anyone interested in the confluence of scholarship, music, and bookmaking.
Posts explore the editing process and featured editions. A-R’s house editors contribute essays on solving editorial problems and field questions from the public. Author-editors of published volumes contribute essays that shed further light on their projects.