Plain-clothes police officers on patrol run into an argument outside a shop. But when they try to find out what is going on, they encounter a surprise. It is Carry on Oxford Street as Barbara Windsor gets a new suit to front the Poppy Day Appeal. Celebrity-snapper Andy Barnes is at the photoshoot launch to capture it in all its glory. The programme meets the workers from across the UK helping to build a new railway deep under Oxford Street. And supercars hit Europe's busiest shopping street.