Northern has issued a "final" warning to teenagers ahead of a major price hike in penalty rail fares.
Northern has called on students to get their under-16 education season tickets before the end of this week ahead of a fivefold fine increase. Rail passengers caught travelling without a valid ticket on trains in England will face a fine of £100 from Monday, January 23.
The Department of Transport (DfT) said last year fines were being increased for the first time since 2005 because they no longer acted as a deterrent against fare dodging. The current penalty for travelling without a valid ticket is £20, or twice the ticket price at the next station, depending on which is higher.