Theatre503, formerly the Latchmere Theatre, is a theatre located at 503 Battersea Park Road in Battersea in the London Borough of Wandsworth, above the Latchmere pub. The venue is known for promoting the work of new writers.

Wandsworth is a London borough in South West London, England. It forms part of Inner London and has an estimated population of 329,677 inhabitants. Its main named areas are Battersea, Balham, Putney, Tooting and Wandsworth Town.