A rail firm is reviewing working practices for its staff after it was left with no trains running on Sunday.
Midland Mainline is reviewing Sunday working
Midland Mainline services from London to the East Midlands and Yorkshire are returning to normal on Monday morning.
Travellers had to catch replacement buses or face long diversions with rival operators on Sunday.
None of its 200 drivers are contracted to work on Sunday and it relies on drivers volunteering for overtime. But they all stayed away in a pay dispute.
New talks are planned for this week between the firm and the union.
The drivers' action follows a similar dispute in April which saw train services cancelled.
Aslef members have rejected a 4% pay offer and no workers offered to work this Sunday to highlight the dispute.
MML is reviewing the policy of not contracting drivers to work on Sundays.
It said in a statement over the weekend: "Midland Mainline has successfully operated a system whereby drivers volunteer to work on Sunday, for many years.
"However, in light of the disruption to its services, Midland Mainline is being forced to review this policy."
The Derby-based firm had to cancel dozens of services for 24 hours and offered buses from stations in Derbys, Notts, Leics and Northants to Bedford where people could pick up Thameslink trains.
Further north, passengers were left to use other operators to get to Doncaster, Peterborough and Birmingham stations and then catch a GNER or Virgin train to London.