Services on some of the country’s busiest rail routes were disrupted for a third consecutive day on Sunday because of a strike in the long-running dispute over driver-only trains.
Members of the Rail, Maritime and Transport union (RMT) at South Western Railway (SWR) walked out on Friday and will not return to work until Monday.
The union said the action was being solidly supported, with picket lines mounted outside stations.
Further 24-hour strikes will be held on September 8 and 15.
A strike was also held on Saturday by RMT members on Arriva Rail North in the same dispute, with further stoppages planned in the coming weeks.
SWR, which runs trains into London Waterloo and across southern England, cancelled services and replaced some trains with buses.
Weekend engineering work added to the disruption.
The union announced last week it had reached an agreement in principle with Merseyrail to resolve the same dispute.
A deal has also been agreed on Greater Anglia.