Its existence has been verified.
Merge pull request #7 from rjw1/wildly

Verify existence of Wildy & Sons.
bob checked that the Beckenham Bookshop still exists.
Put the Waterstoneses in alphabetical order.
Add the Romford Waterstones.
Add Red Cross Bookshop in Palmers Green.  Two Jays has closed, and Bertram Rota has moved out of London.
Book Warehouse (Waterloo) is still open, but Jane Gibberd Secondhand Books isn't.
Woolfson & Tay has closed.
Add photo of Clerkenwell Tales, update Twitter, add news of closing.
Add Foyles' new branch at Waterloo Station.
Clerkenwell Tales has closed.
Greenwich Waterstones is still there.
Add link to LondonSE1 article on Foyles Waterloo.
Add Greenwich Oxfam Bookshop.
Add photo for BHF Streatham, switch to nicer photo for Halcyon Books.
Update photo for Book Warehouse in Holborn (and confirm existence).
My Back Pages has closed.
Add bob's photo of Wildy & Sons.
Update Woolfson & Tay website link.
Add the Wood Street Book Shop.