There are new calls for a transport police force to clamp down on illegal activity on trains.
It's after Irish Rail received 105 complaints of antisocial behaviour on the Cork-Dublin line since the beginning of last year.
Many relate to drug use, including a passenger taking ecstasy tablets on a train.
Dermot O'Leary is the general secretary of the National Bus and Rail Union.
He says a dedicated police force for trains is needed.
