Visa needed for train transients in Europe?

[immihelp]

I, the husband, carry an USA passport and hence have no visa issues in most of Europe


My wife holds an Indian passport and has tourist visas from Swiss and UK and we want to take a train from Switzerland to London. We will be transiting thru France etc on a single Interlaen-London train ticket. For being transient paasengers on this train trip, is there a need to get visas from countries the train will take us thru?


If I were to FLY from switzerland to London, I know visas is not needed other than from UK and Swiss. But a train trip sounds so much fun and exciting.


Thanks

[immihelp]

Did she get Switzerland after it became part of the Schengen countries? If so, her visa is valid in 25 countries.

If not, she should take Schengen visa. https://www.immihelp.com/schengen-visa-for-europe-trip/