(190903) -- LONDON, Sept. 3, 2019 (Xinhua) -- Demonstrators gather outside the Houses of Parliament in London, Britain on Sept. 3, 2019. Rebel Tory members of the British parliament are poised to join their colleagues from opposition Labour to bring forward a bill later Tuesday in a bid to stop Britain leaving the European Union on Oct. 31 without an agreement. The bill will be tabled as the parliament resumes after summer recess amid threats by British Prime Minister Boris Johnson to call a snap election. (Xinhua/Han Yan)