Excess Baggage - 18/07/2009

Sandi Toksvig explores London's City Wall and other Roman remains around the City, and discovers that there is much of the wall hidden from the public eye. She also examines the popularity of 'laughter yoga' in the frenetic city of Mumbai in India, where she takes a tour around the eclectic, cosmopolitan and fascinating city that is one of India's leading commercial and artistic centres.