Discount Art Materials in the UK

I am going to be in London in June where I will take part in 2 weekends at Spitalfields market (19-22 and 26-29 June). I am taking some work over with me but will need to do some when I get there. I have found a website that has really good prices for canvases and paint so I have ordered a whole bunch from there. Have a look at www.discountart.co.uk.