We will be in the UK for a few weeks in May and will be using a rail pass. How necessary are seat reservations? I’m trying to keep a flexible itinerary, so don’t want to make reservations if it’s not needed. The only certainty is our arrival day. We arrive at 8:30 am at Gatwick and need to get to Edinburgh. If we were to get a reservation, what would be a reasonable train departure time from King’s Cross?
Also, I’ve read that getting around on the train/tube is fine as long as you don’t have too much luggage. How much would you consider too much?