yorkshirerail
Member
It could be the stabling and servicing at the KWVR in the platform as you can only fit a 6 coach train fully into Platform 4 at KeighleyI called them on Friday on the off chance that there were still some Keighley - Rylstone spaces and was told that it was full. I did end up seeing the tour at Keighley and was surprised it was only 6 vehicles.
Unless it was related to the pick up points in the Midlands and platform lengths I can't think of another restriction making it this short.