I have tried wading through the forum about the travelcards and oyster cards and the 2-4-1 cards.I am still weighing out the benefits of the 2-4-1 card as a lot of the attractions we want to see aren't available in August but there was on thing I could not quite figure out. I leep seeing that you can get the regular travelcard for seven days on an oyster is what it is saying. I don't understand what that means. Would be so kind as to explain that to me. Do you get the oyster card and use it to pay for a travelcard or what exactly would i do. One more question, does it benefit me in any way if i am taking the Heathrow connect to the city? Do i just buy those round trip tickets seperately? Thanks for your help.