Eagle
Established Member
I accept that the DfT specify the number of trains, but surely the length of each train is up to the TOC.
Actually it isn't (at least not always). The DfT also set minimum capacity requirements on many services. This is why you get a lot of 450s going to Portsmouth, because 3x450 (12-car) holds a lot more people than 2x444 (10-car).