Red double-decker bus drives through Parliament Square, London, with Big Ben in background

london parliament square big ben red bus doubledecker bus cityscape morning traffic transportation urban street architecture historic buildings tourism travel busy street vehicles city life landmark england uk capital city downtown road sunlight sunny day cars hustle metropolitan public transport iconic sightseeing british culture city center daytime congestion wide angle urban scene clear sky european city summer commuting bus route pedestrians crosswalk junction clock tower government buildings