We'll be visiting London from 27th of April to 2nd of May. We'll be staying in a guest house on Sumatra Road (NW6 1PF). Because of the tube strike (48 hours from the evening of 28 April) we don't know what is the best (and the most economical) transportation option for us. We wanted to buy 7-day zone 1-2 travelcard and use tube to commute to sights in central London. One day we are also planing a day trip to Hampton Court palace. Can you please help us?