I do love London.
How long are you going for? What are your interests.
A visit to London is not complete without a trip to the Palace, St Paul's Cathedral, Hyde Park, a show (preferably Andrew Loyd Webber of course), a trip on the London bus, and a few hours in Harrods. There are much more things you can do, The Big Ben, the London Eye, pub crawl through Earls court, markets in Notting Hill on a saturday morning, numerous art galleries.... the list is endless. about 8 years ago
Here's a great city centre walk, or two..
Walk from Leicester Square through Piccadilly Circus (detour into Soho) up Regent Street (visit Hamleys) over to Bond Street, through Burlington Arcade and over the road to Fortnum and Masons, back onto Piccadilly to Green Street Station, through Green Park to Buckingham Palace. On into St james, where there are some great pubs, you'll need a rest. Then you've got Big Ben, The Houses of Parliament and the river to deal with.
Camden market on Sunday. about 8 years ago