As London and Britain grew wealthier, the pressure for a second bridge in the capital became irresistible. Financed by private capital, lotteries and grants, Westminster Bridge was built between 1739 and 1750 under the supervision of Swiss engineer Charles Labelye. By the mid-19th century the bridge was subsiding badly and proving expensive to maintain. The current bridge was designed by Thomas Page and opened in 1862. Rob unearths the human stories and discovers how each bridge changed the face of London and helped shape the story of Britain