LONDON, ENGLAND - FEBRUARY 15:  'Larry', the new Downing Street cat, gazes through a window of Number 10 Downing Street on February 15, 2011 in London, England. It is hoped that British Prime Minister David Cameron's newest team member Larry, will dispense of a rat that has been spotted scuttling past the famous door of Number 10 Downing Street in recent weeks.  (Photo by Mark Large - WPA Pool / Getty Images)