South Western Railway is investigating after a driver appeared to broadcast porn on a train's tannoy, much to the bemusement of the passengers on board.
In a 30-second clip posted on social media sexual noises can be heard as passengers are unable to contain their giggles.
One stunned woman asks: “Is that coming from the driver?”
The footage was shared on Twitter by Paul Brunton on Friday morning, who wrote: "My driver casually watching porn whilst leaving the tannoy system on…"
He told The Times that the incident on the Waterloo-bound train followed an announcement that there would be a short delay to the train journey.