>"South Western Railway has a policy of blocking inappropriate material, including pornographic websites, on its onboard and station Wi-Fi services.
"We are investigating this incident to establish how this material was broadcast on our service.
A mystery for the ages, indeed. It's a good thing portable electronic devices don't have any kind of built-in storage that would permit videos to be viewed without the need for an Internet connection. Cause if you're really crass enough to be watching porn in public or on the job, you wouldn't want to risk dodgy free wi-fi causing an "interruption" at the wrong moment, now would you?