Input (grade 13): Tunnel section recommences Hounslow West, opened 21 July 1884 (as Hounslow Barracks) by the District, renamed 1 December 1925; first served by the Piccadilly line 13 March 1933, resited 19 July 1975.
Output (grade 12): Tunnel section starts Hounslow West, opened 21 July 1884 (as Hounslow Barracks) by the District, renamed 1 December 1925; first served by the Piccadilly Line 13 March 1933.