NO, how much a train ticket is to a border for a trip to a neighbor country has not much to do with visa rules but more with how to travel in a foreign country.
Sorry but this page has rules and as moderator I know the rules.
Good luck. If you have any important issues to report, please ask with PM and the topic can be opened again.
And before more people going to argue about insurance, it is not listed on the website of the E-visa application or on the website of the Thai Embassy in London.