A flag bearing a St George ' s Cross flies from the roof of 10 Downing Street on 23 April 2008 . Prime Minister Gordon Brown marked St George ' s Day by flying the flag of St George over Downing Street . It is the first time in recent years that the flag has been raised at Number 10 to mark the annual occasion . Downing Street has two flagpoles , and the red - and - white banner will fly alongside the union flag . EPA / FRANTZESCO KANGARIS < 저작권자 ⓒ 2007 연 합 뉴 스 . 무단 전재 - 재 배포 금지 . >