The assistant General Secretary of The Rail, Maritime, and Transport Union, Michael Lynch, has defended the upcoming strikes planned for the holiday period in an interview with talkRADIO.
He spoke to us after the Rail, Maritime, and Transport Union announced they're to stage two tranches of three-day strikes, the first beginning on December 22 and the second on New Year's Eve.
This means commuters returning to London or traveling home on Christmas Eve face possible travel misery as the row over changes to the role of conductors drags on.
A Southern spokesman earlier said the strikes are "spiteful, vindictive and pointless" and suggested "this has never been about safety - it's purely about the RMT hanging on to outdated working practices and union power."
However Lynch hit back at the rail network in his interview with Julia Hartley-Brewer, saying Southern had failed to "make any compromises in their stance".
Listen to the full interview above.