Trains in the UK aren't as bad as everyone makes out.
I've very rarely had any cause for complaint when I use a train in this country. I book a week or so ahead, I get a great service for a fantastic price, and I'm usually pretty happy.
On Sunday I'm travelling to Heathrow Airport, First Class, for £36. A journey of some 4 hours.
How much would it cost to get there by ANY other means of transport? Would any other means of transport be quite as comfortable and offer the same level of onboard services?