Rail passengers are being warned of disruption for the next six days, due to an overtime ban by train drivers in the Aslef union.
Fifteen train companies based in England will be hit from Monday until Saturday.
Many will reduce their service levels, and passengers are being advised to check before they travel.
It is the latest move in Aslef's long-running pay dispute.
Strikes by other rail workers in the RMT union are set to take place later this month.
Most train companies rely on drivers working overtime to run their full schedules.
Among the disruption expected:
Last month, Aslef members at 10 operators backed further strike action, meaning it could last for another six months if there's no settlement.
The union has already rejected proposals that would have seen pay rise by 4% two years in a row, bringing drivers' average pay to £65,000.
This would have been contingent on changes to working practices, which the employers and government – who dictate what is under discussion in talks – say are needed to cut costs and modernise how the railway runs.
Aslef argues members should not have to sacrifice working conditions in return for a below inflation wage increase.
Aslef does not have any further strikes planned at present –
But workers such as train guards in the RMT union are expected to walk out on 20, 22 and 29 July in their dispute over pay, jobs and working conditions.
It has now lasted over a year. With no resolution in sight, the train companies are preparing to move ahead with plans to close hundreds of ticket offices.
The Rail Delivery Group said only 12% of tickets were now sold at station kiosks.
Its spokesperson said under proposed changes staff would be moved on to concourses to help and advise more customers. They added that employees and the public would be consulted about any changes.
But RMT general secretary Mick Lynch said earlier this week his union would not "meekly sit by and allow thousands of jobs to be sacrificed or see disabled and vulnerable passengers left unable to use the railways as a result".
The union suggested it could take further industrial action over the issue.
When are the train strikes and which lines are affected?
Do train strikes still have any impact?
French teen’s family tell BBC lethal force rules must change
Go home, France tells rioters
Israeli strikes on Palestinian West Bank camp
Mystery of Holocaust escape girls finally solved
Why Australia is funding an empty detention centre
The AI trained to recognise waste for recycling
The truth about the most iconic French 'vice' Video
Tabloid hacking: What did the bosses know?
One family’s fight to put a price on racism
Your pictures on the theme of 'aviation'
Mystery sea urchin deaths threaten Red Sea corals
The world's most loyal dog turns 100
The darker side of Disney songs
How a photo changed our view of chimps
What professional women often sacrifice
© 2023 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.
Rail disruption warning due to six-day train drivers' overtime ban
previous post