Anyone going to Madame Tussauds should buy a packet of Kelloggs Cornflakes as you can currently get two tickets for the price of one.
Markus007 , 23 March 2011 at 14:01.
If you go to Hyde Park look for the Serpentine Gallery. It is free and quite small so does not take long to go around.
JonnieB , 23 March 2011 at 13:57.