My partner Amy recently wrote an article for UKC about how to use trains to go on climbing trips. Here's a link to the original article. The article was based on the experiances Amy and I have had taking the train to climbing destinations all over Europe and even all the way to China! Here's a copy of the article:
How I got into train travel and my motivations
First train journeys! Some ideas...
Train travel top tips...
Planning & booking
Life on board
Making the most of travelling overland
Travelling further afield