Editing Piccadilly line (section)

===Historical services===
On 11 October 1909, peak-hour services were altered to have trains skipping certain stops to improve journey times. Trains were marked with "Non Stop", which were deemed unpopular and ambiguous among passengers. Illuminated signs were added on platforms in 1932 to address this issue. Pairs of stations were the norm, such as Holloway Road and York Road, and Caledonian Road and [[Arsenal tube station|Gillespie Road]]. After World War I, [[Covent Garden tube station|Covent Garden]], Russell Square, South Kensington, Brompton Road and Gloucester Road were among the stations skipped. [[Boston Manor tube station|Boston Manor]], South Ealing, North Ealing and Barons Court were included into these patterns by 1938. Skip-stop services were discontinued in June 1947.{{sfn|Horne|2007|pp=32,75,93}}

In 1930, during the planning of the northward and westward extensions, a 30tph peak-hour service was proposed between Wood Green and Turnham Green. This was preferred over an alternate skip-stop service through [[Bounds Green tube station|Bounds Green]].{{sfn|Horne|2007|p=75}}{{refn|Several stations were planned to be closed to improve running times, and Bounds Green would not have been included as a station.{{sfn|Horne|2007|p=75}}|group=note}} When the Piccadilly line was initially extended to Northfields in 1933, [[South Ealing tube station|South Ealing]] was skipped. It was eventually served on 29 April 1935 by off-peak trains, and peak services in May 1942.{{sfn|Horne|2007|p=59}}

When the Piccadilly line shared its storage of trains with the District line at [[Lillie Bridge Depot]],{{sfn|Horne|2007|p=26}} some trains started and ended their service at [[West Kensington tube station|West Kensington]]; a few of these ran empty between West Kensington and Hammersmith. These services ceased on 27 October 1991.{{sfn|Horne|2007|p=128}}

During disruptions, Piccadilly line trains were able to run on the “local” District line tracks, stopping at all stations between Acton Town and Hammersmith. The crossover points at Hammersmith were decommissioned and subsequently removed in the early-2020s meaning that this is no longer possible. <ref name="culgpiccadilly" />