Leaving a train early? Watch
A train ticket to a destination just past where I want to go is a lot cheaper than where I actually want to go.. (for some reason). It travels through the station I need, can I just get off early and pay for the cheaper ticket? Or will I not get through the ticket barrier? If anyone has done this before!
See section 16 of the National Rail Conditions of Travel
16.5 If you start, break or resume your journey at an intermediate station where you are not entitled to do so, you will be liable to pay an excess fare. The price for this will be the difference between the amount paid for the Ticket you hold and the lowest price Ticket available for immediate travel that would have entitled you to start, break or resume your journey at the station concerned.
If in doubt, ask at a station ticket office before buying the ticket. They are obliged to give you accurate information.
I think technically it's not OK. If it's close though you can claim innocence and say someone offered you a lift home if you were confronted. The ticket barrier won't let you through but the ticket guard probably will (if the barriers are even functioning...).