Input (grade 12): Hounslow Central, opened as 1 April 1886 (Heston-Hounslow) by the District, renamed 1 December 1925; first served by the Piccadilly line 13 March 1933.
Output (grade 10): Hounslow East: opened 2 May 1909 (as Hounslow Town) by the District renamed 1 December 1925; first served by the Piccadilly Line 13 March 1933.