My family, which includes a 10 year old and a 13 year old, will be in the London in June. From there we will be heading to Edinburgh, then Glasgow, then York and back to London. I understand that we can get the cheapest fares if we buy 90 days out. We are fast approaching that 90 day period and I need help figuring this all out. Can anyone offer advice on what type of tickets I should purchase--family railcards, one way, roundtrip. It is very confusing for a first timer! Thank you in advance.