I'm going to cheat unfortunately and pass on information from an amazing article I read in Time Out titled: "London's best new vintage shops".
I would love to claim that I've visited and reviewed them all (...and one day I definitely will!) but I've unfortunately been occupied with rather less glamorous activities.
So if you live in London or are planning a trip, make sure you reference the list - I have a Cafe Vintage visit booked into my diary...