Kevan Davis: The month slab implies that this is an analemmatic sundial, but the twelve stones are spaced evenly in a full circle, so I'm not sure that this actually makes any sense.
Museum · Forest Hill, London, Greater London · 74 tips and reviews
Kevan Davis: There's a sundial trail running through the gardens and conservatory here, showcasing eleven different types of dial. http://www.sundials.co.uk/~hornimn.htm