If your Issue is:
I need to get cash out and it's currently out of hours.

Answer:

There is an ATM on campus. See the Campus Plan (George Wing) https://www.rau.ac.uk/file/rau-campus-map

You can also see:
http://www.nearestcashpoint.co.uk/search/cash-points-in-cirencester-gloucestershire

NOTE: At the current time, card only payments will be accepted on campus.