[1] The Show ran from 15 June 1903 to 4 July 1903 during which period trains operated a circular service to and from Paddington via Park Royal and Ealing.

On two Sundays in February 2010, Chiltern and Wrexham & Shropshire trains were diverted to Paddington via the line while engineering work blocked the route to Marylebone.

Locally the service is called the 'Push-and-pull', a term which dates from the days of steam, when the engine could not change ends at Greenford and so the locomotive pulled the carriages one way and pushed them on the return run (see GWR Autocoach).

As Drayton Green, Castle Bar Park and South Greenford have short platforms the maximum length of train that can be used is two cars.

[5][6] In March 2024, following delivery of unit 230001 to GWR, trial running began of the new battery-powered train and fast-charge technology on the line.

The trials demonstrated a charging time of 3½ minutes at West Ealing, using a bank of batteries installed adjacent to the platform to prevent power surging.