Hi I hope someone can help me out here. Is it possible to find out in advance which class of train will run on which service, specifically on the Ecml. My autistic son is a class 91 junkie and he gets upset if I drag him onto an Hst. I've looked on open train times and have a rail guide book but I can't seem to get a class Number from a head code or service Number, is this doable? Thanks. Ian P