The NSW State election will take place on 25 March. If you’re overseas you can still take part by applying online to vote by post. In-person voting won’t be available at the Australian High Commission in London, but you can drop your completed postal vote at the Royal Borough of Kensington and Chelsea Town Hall, Hornton Street, London W8 7NX. Alternatively you can return it directly to the NSW Electoral Commission in Sydney.
Further details on opening dates and hours are available at the NSW Electoral Commission website.