We will be vvisiting England and Scotland, but we will start off in Amsterdam for a few days before hand. I am planning to buy the Global Flex Pass. In trying to figure out the best pass with the online planning tool, I was unable to add a leg from Glasgow to Edinburgh or London to Exeter. Is this because these legs are not covered? Or are the distances so short that it's just not worth bothering with the pass? We do plan to travel by train for daytrips around Glasgow and London, so should we buy a few days of the Britrail pass too? Thanks in advance for your comments/responses.