Since we're getting into oil painting some people may want to invest in some of their own art materials eg good brushes and various mediums. Here is a list of good art supply shops I have used in and around London. Feel free to add to it with your favourite!
General:
CASSart: everyone probably knows this already, ask for a student discount card (need to show student ID or course registration doc) to get 10% off full priced items. There are 6 shops in London (all open on Sundays), and they run regular introductory workshops on drawing, painting, printmaking and photography so keep an eye out, here.
The Islington branch has good oil paints (eg Old Holland, Michael Harding) and special discount evenings sometimes.
Limited stock for online shopping.
