South Ealing , opened NUMBER@1 May NUMBER@2 by the ORGANIZATION@1 , later LOCATION@1 line ; first served by the Piccadilly line NUMBER@3 April NUMBER@4 .

ORGANIZATION@2 , opened July NUMBER@1 , NUMBER@5 by the ORGANIZATION@1 , later District Line ; first served by the Piccadilly Line July NUMBER@6 , NUMBER@7 . LOCATION@2 , opened NUMBER@1 May NUMBER@2 by the District ; first served by the Piccadilly Line NUMBER@8 March NUMBER@9 .
