Santander, 46a George Street
There used to be another branch of Santander a short distance along George Street, at number 66-68, but as of October 2014 that one has closed.
This one was previously a branch of Abbey (as of July 2009, according to Google Street View).
Existence last checked in March 2017.
OS X co-ord: 532474 OS Y co-ord: 165591 (Latitude: 51.373928 Longitude: -0.098116)