My sister and I are hoping to go to both the UK and Ireland in the next year or so. We would like to do this by train versus renting a car as not comfortable driving there. We can book the travel in advance so what suggestions might you have for us to coordinate our entire trip using trains i.e. what company to get passes from, is it even possible to travel within all of the countries (England, Scotland, Wales, Ireland) by train, etc...? Thanks so much for any advice you can give us.