President Patil leaves Britain after three-day visit < ');" class="size11 blue"> RatePresident Pratibha Patil left London Thursday after a three-day state visit to Britain, the first by an Indian president in nearly 20 years.Patil had earlier in the day joined Britain's Queen Elizabeth II to launch the 2010 Commonwealth Games Baton Relay at a gala Indian ceremony in Buckingham Palace.The Indian president...