The Large One
Who's Next?
This situation is something like what happened to me recently. I purchased an advance purchase single ticket for the 11:17 Victoria to Eastbourne train for around £8. I decided to leave the train at Lewes as a mate of mine asked if I wanted to go for a pint. After a few pints of Harveys I went back to the station and there were some ticket inspectors on the station entrance where the car park is. They told me that I would have to purchase a new ticket as this ticket was only valid on the 11:17 train from Victoria to Eastbourne and on THAT train only. They also said that strictly speaking I should have continued on that train to Eastbourne and not left the train at Lewes. I had to pay again to get to Eastbourne, fair dos I say. Even with the single from Lewes to Eastbourne I still think its a fair deal. Rules are rules I guess?
The difference is - you were not fined for getting off, in your instance, at Lewes.