Semantically, a train must comprise two or more coupled vehicles - camel (when roped together) train, road train, etc. A simple string of non-coupled units/items/animals is not a train. For the railways, though, the term describes any vehicle or number of vehicles occupying the railway. 'Flying Scotsman' is generally known as a locomotive, but at a stretch could be defined as a train as it comprises two coupled vehicles - locomotive and tender. It is, however, very annoying when the media decribe a locomotive as a train!
It's not just a slow news day, the news has actually stopped!