For about 2000 years there has been a bridge at the site of the present London Bridge and during that time London has grown from a small Roman bridge head and camp to be a world megalopolis. Until 1750 it was the only bridge in London and the next bridge over the Thames  was  upstream at Kingston. In fact , there have been a number of different structures on the site, each called London Bridge, and the talk will outline their story over two millannia.  The talk will be given by Doug Irvine, CivilEngineer.