Internet users have noticed a ticket hack that can get passengers from Cork to Dublin for half the price - but what they may not know is that doing it is against the rules.
Most people who regularly commute between the capital and the 'real capital' know that it costs quite a pretty penny, with a return ticket generally costing between €32.99 and €45.49 each way.
In real terms, that means you're paying around about €66 for every journey - though semi-flexible tickets reduces that somewhat.