You might want to pop along to this at Belgravia Books:
Belgravia Books, founded by established publishers Gallic Books, opened in 2011. It sells fiction and general non-fiction including a broad range of translated fiction. They offer free tea and coffee (sometimes homemade cake as well) and ‘plenty of friendly book-buying advice’. And if you can’t make it to the shop you can order any of their books online, with FREE UK first class delivery. You can find their events page here.