Conservative Tim Loughton, East Worthing and Shoreham MP, has asked for an assurance everything will be done to end a "nonsense of a strike" and "give our constituents their lives back".
At Prime Minister's Questions, Theresa May agreed that it was an "appalling strike" and suggested that Jeremy Corbyn should call Aslef, who donate to Labour, and tell them to call the "strike off immediately".
REPORT: Southern trains ground to a halt for the third day this week as angry passengers staged a protest at Victoria station
Talks aimed at resolving the Southern Railway drivers' dispute are being held at the conciliation service Acas.
Frustrated passengers share their stories as the worst train strike for 20 years hits home.