Was again back in London showing my wife around. This time, I was armed with the Lonely Planet, so I think, we were able to get much more out of the sight-seeing. Just relying on the signs and the tube map can be mis-leading. For example, the tube map doesn't show that Charing Cross, Leicester Square and Westminister are in walking distances of each other. The time it takes to walk underground to the tube stations is much more than if you just walk to these stations above ground. And then there is the advantage of actually experiencing the sights and sounds of the city.
Since, I was tour-guiding for the wife, had to stick to the same routine - Tower of London, Tower Bridge, Cruise, Greenwich, Trafalgar Square, Buckingham Palace. Wished I had done at least a museum probably, didn't happen. Also, wanted to go around, some out of way spots - probabaly only thing we managed was Neasden's Swami Narayan Mandir (awesome- probably, the best temple I have seen). Next time, (provided I am around), will time my journey around some event (Noting Hill carnival etc) and make sure I check out the museums - Tate Modern, Nat History, or British Museum (atleast). Also go to Brick Lane and do the Wapping Dockyards walk.