Original: South Ealing, opened 1 May 1883 by the Metropolitan District Railway, later District line; first served by the Piccadilly line 29 April 1935.
Simplified: Acton Town, opened July 1, 1879 by the Metropolitan District Railway, later District Line; first served by the Piccadilly Line July 4, 1932. Boston Manor, opened 1 May 1883 by the District; first served by the Piccadilly Line 13 March 1933.