Records of the Uxbridge Choral Society,1925 to 1992. The collection consists of minutes, general and concert administration, finance, printed material including programmes and posters and some photographs of rehearsals.
You will need to scroll down to where the actual midi files are and ignore the enticing big green buttons, they are nothing to do with Cyberbass.
Useful source of Midi files
Suzanne Munro is a choir member, composer and pianist whose compositions are available on her website.