I don't live that far from Bexleyheath and there is still a Sussex Stationers there. A lot of the branches, including the one near where I work closed down last year. Although it is not a great bookshop in terms of range it does have one attribute worth going in for and that is it discounts new books. So in terms of getting something topical to read it is a good option.
This pic, which I garnered from the web, is not my local branch but gives you an idea.