Hello. I should start by saying I don't know much about real or model trains, but I like this TT project and recently jumped in and bought the three different A4 locos. I would like to represent three realistic full length trains with them, so I have a few questions. 1) What is a realistic train length for Mallard, Falcon and Silver King - i.e. which types of coaches made up the train and how many, and which liveries would they be in? 2) Are these coaches and liveries available from Hornby? I can see several coaches listed, but I don't really know what I'm looking at. 3) If all of the coaches are not available (for example, I'm pretty sure there was food available on these trains) will they become available or should I look elsewhere? Thanks in advance for your help.