From 10/10/26, Northern are 'trialling' compulsory reservations on the Leeds-Nottingham/Lincoln services.
This will result in trains with no reservations remaining showing as sold out in journey planners.
The change is showing in Real-time trains:

(Image shows RealTimeTrains screenshot with the "reservation compulsory" tag)
From the 10th October Northern will be conducting a trial on our Leeds – Nottingham/Lincoln services to improve our forward-looking demand insights and provide further commercial levers to influence demand and mitigate crowding.
Today, we only receive detailed booking information for customers purchasing Advance tickets.
While walk-up tickets can be bought right up until departure, we have limited visibility of which services customers intend to travel on before they arrive at the station.
As part of this trial, walk-up ticket availability will be linked to train capacity. When a train reaches its available capacity, it will be shown as sold out across retail channels. This will provide better insight into anticipated demand, helping us make more informed decisions around capacity planning, revenue management and customer information.
This will result in trains with no reservations remaining showing as sold out in journey planners.
The change is showing in Real-time trains:

(Image shows RealTimeTrains screenshot with the "reservation compulsory" tag)
