Very few people don't take rail for the fun of it. People take rail to go somewhere, therefore the market is transport. The options for say Glasgow to London

Very few people don't take rail for the fun of it. People take rail to go somewhere, therefore the market is transport. The options for say Glasgow to London are Drive Coach (2 operators (national express, megabus) Fly (2 operators I think) Train (2 operators) That's 7 different options, each has pros and cons