A question for Londoners

This is a lot to ask, but I need an alley. It doesn't need to be a long one, and it can be a dead end. But I need an alley. Requirements:

-- In the Whitechapel area of London, or on its fringes;
-- Cobbled;
-- Not gentrified / modernized - in other words, if you walked down it, you could imagine yourself going back in time.

Thanks!

Mark