Southern strike: Troops could be brought inpublished at 08:28 Greenwich Mean Time 23 December 2016
Bob Dale
BBC Live reporter
BBC South East understands the army's been asked to put contingency plans in place to ensure commuters get to work if problems continue on Southern Rail.
We've learned military leave could be cancelled and soldiers instructed to drive buses carrying passengers.
It's likely to be welcomed by one MP who told us earlier that without this action her constituents would be stranded in the New Year.