Hello, My family of four (2 adults, 2 children) are coming to London In June. We have rented a flat In Bayswater for the week we are there. We have a 2 to 3 minute walk to Paddington Rail and also the Bayswater tube. We Plan on going to Harry Potter Warner Brothers one day, and a must for my kids is to travel to Cardiff to See the Dr. Who attraction on another day. I plan on pre purchasing those tickets online to get into the attraction before we go. That leaves us four days to travel around London and see the sights, shop, and so on. Would the London Pass or would a 7 day Travelcard which from what I have read allows you to use the tube, bus, and Rail with 2 4 1 coupons to use for the attractions we want to see be better? Thanks for your reponses.