- 24 updates
The ASLEF union has announced three fresh strike dates for 24th, 25th and 27th January.
ASLEF's General Secretary Mick Whelan has warned that there is a "likelihood" that further strike action will be called.
Mr Whelan said a meeting will be held later this month to determine the next steps.
The union has reduced next week's strike dates from six to three because of public concern about the impact of a week-long halt to services.
Overtime is currently banned by the union which has affected services daily, leading to cancellations and delays.
The ban means there is currently a 25% shortage of drivers on Southern which explains the impact on services.
The Rail, Maritime and Transport union is also involved in a dispute with Southern over the changes to the role of conductors which has also led to strike action.
A six-day strike by Southern Rail drivers scheduled for next week has been cut to three days.
Members of the ASLEF union were due to walk out for the entire week from midnight on Sunday in a bitter dispute over driver-only trains.
Strike days will now be held on the 10th, 11th and 13th January.
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