'Larry' the new Downing Street cat, pictured at Battersea Dogs and Cats Home in London, walks on a sofa before being taken to the Prime Ministers residence on February 15, 2011. British Prime Minister David Cameron has unveiled the latest member of his team -- a cat, that it is hoped will dispense with a rat spotted scuttling past the famous door of Number 10 Downing Street in recent weeks.  AFP PHOTO / POOL / CARL COURT (Photo credit should read CARL COURT/AFP/Getty Images)