I discovered this hidden gem by pure chance when i explored the area in one of my lunch breaks. Rochelle Canteen is hidden away behind the walls of three former victorian schools on Arnold Circus in London's Shoreditch. The atmosphere, upon entering the ground, is relaxed almost tranquil. The canteen itself is situated in the old bike shed and the kitchens' size almost belies it's output. The food is distinctively modern British; run by Arnold & Henderson, a household name of britisch cuisine. The guests are local creative types so that the atmosphere is more relaxed then anything else. In the summer you can also sit outside.
Being an East London boy at heart I am partial to an occasional fix of café culture. Pellici's has been running since the start of the last century, to which me, my father and my father's fathers have all enjoyed its mix of tasty Italian/London grub and energetic atmosphere. If you're visiting, make sure you drop by, as it will provide a valuable, forever-depleting education into what East London is really all about.
Sans Pere is my new favourite place to have breakfast, café or lunch. In the heart of Shoreditch it really feels like a modern home. Their quiches are delicious and they have an in-house patisserie kitchen and let me tell you their cute bite-size choux and bronuts (brioche-donuts) are worth the detour.