What is the oldest bridge over the River Thames in London?

Richmond Bridge is an 18th-century stone arch bridge that crosses the River Thames at Richmond, connecting the two halves of the present-day London Borough of Richmond upon Thames. It was designed by James Paine and Kenton Couse. The bridge, which is a Grade I listed, was built between 1774 and 1777, as a replacement for a ferry crossing which connected Richmond town centre on the east bank with its neighbouring district of East Twickenham to the west. Its construction was privately funded by a tontine scheme, for which tolls were charged until 1859. ... The bridge was widened and slightly flattened in 1937–40, but otherwise still conforms to its original design. The eighth Thames bridge to be built in what is now Greater London, it is today the oldest surviving Thames bridge in London.