LONDON - OCTOBER 29: Queen Elizabeth II, left, and India's President Prathibha Devi Singh Patil, second from left, arrive to launch launch of the XIX Commonwealth Games Queen's Baton Relay for the Delhi 2010 Commonwealth Games outside Buckingham Palace October 29, 2009 in London. The Indian President, Prathibha Devi Singh Patil, and her husband, Dr Devisingh Ramsingh Shekhawat, are concluding their three-day state visit to the UK during which they have stayed in Windsor Castle.