Mallaig is only served by 156s also and was my other choice in clue 4, and I think is the unique answer (it can't be Fort Bill due to the sleeper, which will fail the one class of train, York and Scarborough both have more than 2 platforms).
This is where I am going to object. The Jacobite is shown in the NRT. Therefore, I claim that Mallaig is served by two TOCs and more than one class of train. Thus, assuming it is the right answer, I'm appealing for a dud clue penalty. Ivo, please can you adjudicate.