They were originally part of New London Bridge which replaced the old London Bridge in 1831.
Old London Bridge was narrow and decrepit which is not really surprising when you consider it was over 600 years old. New London Bridge was built 30m West of the original bridge and after a design competition in 1799 work began in 1824 and the bridge was opened on 1 August 1831 by Kind William IV and Queen Adelaide. Old London Bridge was subsequently demolished.
The bridge was 283m long and 15m wide and was constructed from Haytor Granite from Dartmoor. The East side of the bridge was in the 20th Century noted as starting to sink and in 1967 the bridge was sold for $2.46m to America Entrepreneur Robert P McCulloch and removed stone by stone and re-erected in Lake Havasu in the USA. These two copings were unearthed on the South side of the bridge during construction work for a sculpture. They are now used as low seats.