Who is 'Larry the Cat', 'Chief Mouser' of UK who has outlasted 6 UK PMs?

Larry is a British domestic cat who has been 'Chief Mouser' to the Cabinet Office at UK PM's official residence since 2011. Larry, who has outlasted six UK PMs, was brought in by former PM David Cameron to deal with a mouse problem. The white and tabby cat was adopted from the nearby Battersea Dogs & Cats Home.