Whilst I was in London about two weeks ago I had to take a look round Cass Art. Cass Art is an art shop based in London and sells all art supplies. There are just 5 shops in London, Islington store being the largest with over 3 floors, but unfortunately they don't have an online shop, which is a pity for us who don't live anywhere near London. But if you have some spare time and money if your visiting London, you should take a look round. And I must not forget to mention that they have a sale on all year round, so what are you waiting for. They also have regular workshops and activities for everyone. I absolutely love their slogan:
'Lets fill this town with artisits'