Police officers cordon off roads near Houses of Parliament in security alert involving a suspicious vehicle near Westminster Bridge, London. - Jess Hurd - 2010s,2019,adult,adults,alert,bike,bikes,blocked,BMW R1200RT,Bridge,cities,City,CLJ,closed,closing,closure,closures,cordon,Counter Terrorism,Crime,evacuate,evacuating,evacuation,force,highway,Houses,i