train services on the line are operated by southeastern. since 16th november 2019, the most typical trains that run on the line are 3-car class 375 electrostar emus which have replaced the 2-car class 466 networkers, initially to power issues, but ultimately so the units are fully accessible for disabled passenger in 2020, which would have been brought in on 15th december 2019 with the new timetable anyway. class 465s were considered for this line but due to sighting issues for the guard at swale station, it was decided it would be safer to use the electrostars as the guard has better control over the doors. previous units used on this line were 3-car class 508 merseyrail emus introduced as a stop-gap from 1996 to 2006 to replace the mk1 slam door emus.