Thousands of rail commuters in south-east England are facing a second day of disruption because of a pay row.
About 200 First Capital Connect services between Brighton and Bedford have been axed as drivers refuse to work voluntary overtime.
Drivers’ union Aslef said its members would vote in the next few weeks on whether to launch a campaign of industrial action over a two-year pay offer.
A statement on the First Capital Connect website read: “We are extremely sorry that a shortage of train drivers has forced us to cancel a large number of services on the Thameslink route.
“To allow us to operate as consistent a timetable as possible over the coming days, we have introduced an amended timetable. We will endeavour to adhere to this timetable as much as possible, however it may be necessary to further amend it.”
Drivers decided not to work overtime on Sunday, leading to massive disruption to services.
Unions insisted workers were not taking industrial action, but merely following their contractual right not to work overtime if they do not want to.