I read the page on the 2-4-1 information, but still have a question. Our group is traveling from Birminghan to London/Paddington on a Monday. Obviously we will have a rail ticket to use towards the 2-4-1 special (interested in Tower of London specifically.) However, since we don't have a return rail ticket, but will be flying out of London, will this still qualify us for the 2-4-1? In addition, if we arrive on a Monday, can we use the 2-4-1 on Weds of that week? After reading the explanation on this site I think the answer is no. (Without a return rail ticket.)
Another question, after we leave Paddington station we need to take the underground to Marybone (sp?) to get to our Maida Vale location. This is not included in our train ticket. Can we get our underground ticket at Paddington and perhaps get our Oyster card then? Suggestions please? We are in London for 3 days. Suggestions are appreciated.