It's become a common sight across Britain's rail network - passengers brazenly travelling without buying a ticket and then attempting to get away with it.
But while many avoid detection using a variety of illegal tactics, others are caught in the act by revenue protection officers stationed across the network.
Some try pushing through barriers to avoid having to touch in or out, while others attempt to buy 'short tickets' for only part of their journey for a cheaper fare.
Others resort to violence if they are caught, with shocking videos filmed at stations showing passengers attacking police officers or punching security guards.
Now, a new Channel 5 documentary called 'Fare Dodgers: At War with the Law' airing on Monday evenings at 9pm has uncovered the scale of the problem.
