Chalk Farm Underground Station

MATERIALS: Steel frame clad in brick, faced in ox-blood red faience produced by the Leeds Fireclay Co Ltd.

EXTERIOR: The station occupies a prominent site at the convergence of Adelaide Road and Haverstock Hill, and has two elevations meeting at an acute angle with a curved apex. 2 storeys high. It originally had an opposing entrance and exit on both elevations; those on N side now blocked. S elevation in Adelaide Road is the longest of all the Green stations and consists of 8 pilastered bays arranged 3-1-1-3 with alternating half-bays, the triple bays forming a continuous arcade, terminating in a half-bay at the W. Entrance is in the penultimate bay to the W, while the former exit further E is now a shop. The curved apex is accentuated by an overhanging upper floor with a pedimented tripartite window. The ground floor was always a shop, originally an Express Dairy, which also occupied the 3 adjacent bays on both sides of the angle; the shop front is modern. The shorter N elevation has similar treatment with 6 main bays arranged 2-1-1-2 of which the eastern single bay was an entrance. Both elevations retain original windows to some bays, while others have been been infilled with faience. Upper storey has timber Diocletian windows in keyed semi-circular arches with egg-and-dart decoration and cartouches between the springers of the arcaded bays, and a modillion cornice. Each half-bay has a deeply hooded oeil-de-boeuf.

Above the entrance, the former exit on the N side, and the shop front at the apex, are blue tile signs with white relief lettering reading UNDERGROUND, added in 1908. Frieze lettering has otherwise been removed. To the right of the entrance is a 1930s pole and roundel Underground sign.

INTERIOR: Ticket hall retains a number of features including moulded cornices, an early brass clock, six-panelled door with paterae, fluted timber wall banding and railings enclosing the top of the stair. Tiling has been replicated to the 1906 pattern. Some original mauve terrazzo flooring survives in the disused exit area to the rear of the lifts. Original tiling in dark red and cream survives in the spiral staircase and lower corridors; that to the platforms replicated in 2005, apart from the soffit banding and some remnants of directional signs.