True. But if they're going for the "hotel on wheels" luxury experience, St Andrews is an important market. Certainly more than Aberdeen is so might as well save the diesel, track access charges and staff hours.I don't think you would save much money by doing that, basically just diesel and track access. It's having a third portion at all that adds a lot of the faff and cost over a simpler two-portion train, as it complicates the shunting considerably and requires another driver and guard.