Yes - for example the SR turned out 3-4 Pullmans for Derby Day for years.
But in the T and RS forum I think the Royal Train naturally refers to a specific set of vehicles (or possibly older versions - IIRC there were complete East Coast and West Coast trains pre WW2).
But in the T and RS forum I think the Royal Train naturally refers to a specific set of vehicles (or possibly older versions - IIRC there were complete East Coast and West Coast trains pre WW2).