9. Various Art Galleries
Why? Well, a) many of the major museums and art galleries stay open late, and b) a great majority of them charge no admission. There are lots of free attractions in and around London, true, but there’s just something about the elegance of art galleries that makes them incredibly valuable. For example, some of the finest artworks in the world have a home in Tate Britain and Tate Modern. The former displays British Art from the 16th century to the present day, while the latter exhibits contemporary art. Other examples include the National Gallery and National Portrait Gallery in Trafalgar Square, as well as the Wallace Collection, which can be found just off Oxford Street.

Free is always good, especially when in London. Amazing saving tips, thanks Paul and Paula!