Where can you get out of date Fashion magazines in London?!

Where can you get out of date Fashion magazines in London?

I am doing this project which I need quite a lot of high quality fashion images, but I don't want to spend a whole lot of money on new magazines, just wondering if anyone know if there is anywhere in London which they sell old fashion magazines in London.
I think a few months ago I saw one store in leather lane which does it but today when I went there the stall disappeared!
I am pretty desperate so please help!***

try Doctor's and dentists waiting rooms - they always seem to have out of date mags when I go!