Opposite the Measures's building, the original two-storey Bakerloo line entrance was designed by Leslie Green which resembles the original architecture of the Baker Street and Waterloo Railway (BS&WR) stations. It is the only station to have the original tiled signage and a cartouche bearing the Underground Electric Railways (UERL) company insignia retained. Like other original BS&WR station designs, it features ox-blood red terracotta and a brick-clad steel frame. The terracotta was manufactured by Leeds Fireclay Co. Ltd. Unlike the other building, the offices above are not Grade II listed. The station name is carved with raised gilded lettering on the lower frieze to Argyll Street and Oxford Street.