I am in the very early stages of planning (2019) and wondered if anyone has taken Brownies on an overnight sleeper train? The cabins hold 6 berths, and my concern is around security and safety. If the doors are locked from the inside, how do you gain access in an emergency. And how do you stop them sneaking in and out of each others cabins all night? If anyone has done it before and survived, I would love to hear your experience and tips. Trip will go from London to Scotland.