People are only just realising what the mystery seat switch on trains is for
![People are only just realising what the mystery seat switch on trains is for](https://i2-prod.mirror.co.uk/incoming/article32795608.ece/ALTERNATES/s615/0_Modern-passenger-train-interior-with-scenic-window-view.jpg)
A snap of a mysterious switch on a train has left Brits scratching their heads after many realised they had no idea what it was for, but now it seems the mystery may have been solved