wow, it's amazing to view the city on double Decker bus. Seeing the city by foot is not a bad idea at all but you have a lot of time and pleasant weather outside. London is the place which may suit you traveling as a foot but in our part of the world where the humidity and temperature are high it is impossible. Thanks for sharing the nice coverage of London city @karensuesstudios
Foot is better, but the bus allows you to cover more ground! :)