Seymour Leisure Centre

This is a public baths and laundry building, later converted into a leisure centre, constructed between 1935 and 1937 by Kenneth Cross for St Marylebone Borough Council. It is a group value building. The building is constructed of purple brick with red brick window architraves and Portland stone dressings, and has gabled Spanish tile roofs with brick ridge stacks. The design follows a "courtyard plan," with a central, high-quality swimming pool. The architectural style is that of a Renaissance “palazzo.”

The Bryanston Place elevation is two stories high with fifteen bays. It features revealed metal doors, in an Art Deco style, set within three semi-circular arched stone architraves at the center, with carved stone medallions to the spandrels. Art Deco-style metal glazing bars are found in all windows; the full-height ground floor windows have semi-circular arched architraves, while the first-floor windows are square-headed rectangular and centered with three moulded stone architraves. A modillioned stone cornice tops the building, culminating in a bell cupola.

The similar, eleven-bay elevation to Seymour Place and the twelve-bay elevation to Shouldham Street feature sashes within square-headed architraves with sunk aprons. The Shouldham Street elevation includes a moulded stone door architrave to the left and two wider, similar architraves, each surmounted by a sash within a raised architrave with ramped sides and an open stone pediment.

Inside, metal balustrades are present on the staircases in the entrance halls. The main swimming pool is roofed over by reinforced concrete elliptical arches supporting stepped-section windows, drawing inspiration from The Royal Horticultural Hall of 1927-8 and European prototypes such as Freyssinet's Orly Airport Hangers, 1921-3. The pool is designed to be adaptable for use as a cinema, sports hall, or meeting hall. It is surrounded by spectator galleries with metal balustrades and includes a proscenium feature at one end.