Aerial View of London over the River Thames including Tower Bridge, Shard and the Tower of London at twilight

london tower bridge river thames river thames twilight lights shard tower of london police bus cars road bridge hms belfast police boats river police barge hotel buildings skyscrapers traffic night flickering shimmering rooftop sunset skyline boats capital city tower clouds flashing lights metropolitan police aerial drone birdseye uav events tourists red bus arena stadium sky skies people attractions police lights water