LNER which run trains from London Kings Cross to Edinburgh via Peterborough and York have announced a new international website which will allow ticketing in the language and currency of the visitor.
Currently the new website is not optimized for US/Canada but that will come in time.
The trade magazine that I read has the article at https://railuk.com/business/train-operating-companies/lner-launches-international-website-making-travel-simpler-for-overseas-tourists/
Patience boys and girls... tomorrow will come