38 Charterhouse Street, Smithfield, London, EC1M 6JH
Barbican: turn left out of the tube then next left down Carthusian Street. Walk down towards the market past the Square and you'll see the pub on your right opposite the market. Farringdon: turn left out of the station and head up Cowcross Street to the market. Turn left along Charterhouse Street and you'll see the place ahead of you in the pointy building.