We leave on Tuesday for London for 3 days. Really more like 2 1/2. My husband has some health issues so I'm thinking it'll be best to do as much bus riding or taxiing as possible. Our thought was to get on a double decker bus tour and see as much as we can to get an overview..and then decide on two or three things to see in more detail. (1) Does the Oyster card cover those buses? Or, is that a separate touristy kinda thing? (2) We're staying in S. Kensington. Is it easy to get a double decker bus over there? (3) name your #1 favorite attraction that we should not miss.... just one. (4) I want the kinda bus we can hop on and off whenever we get the itch. (5) Favorite pub... really good fish ' chips + a good beer... I know it's late. I'm usually way more on top of things than this, but not this time. :-) Thanks for your help!