What happened
On 21 December 2022, TransPennine Express urged rail passengers not to travel after an IT issue caused cancellations and disruption across its network in northern England and Scotland. The operator said the problem was a 'software issue rather than a staffing problem', and that it anticipated cancelling around a third of the 325 services planned for that Wednesday — days after it had introduced a new timetable earlier in the month.
Customer service and operations director Kathryn O'Brien said: 'Due to a significant rostering system issue, today we are experiencing a high level of unplanned cancellations', adding that TPE was 'working hard internally and with our system provider to resolve the situation as soon as possible'.
The failure landed on passengers who had already spent months with reduced timetables, crowded services, industrial action and last-minute cancellations; TPE had recently come under criticism along with other northern operators after regional mayors demanded an end to the 'chaos' on the network.
What it cost
About a third of 325 services cancelled on 21 December; passengers told to seek other transport during the Christmas peak.
Why it happened
The rostering system is a railway's hidden critical path: when it fails, crews cannot be matched to trains and cancellations cascade.
It landed days after a new timetable, in the busiest travel week of the year, when recovery options were thinnest.
Telling customers 'don't travel' before Christmas is the clearest admission that the operation, not demand, had failed.
The lesson
New timetable plus new software in peak season is a schedule written in hope: rostering is infrastructure, and it needs bedded-in time.
Aftermath
TPE said it was working internally and with its system provider to resolve the situation as soon as possible; the material does not record when normal service returned.
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