Caversham Lock is a lock and main weir on the River Thames in England at Reading, Berkshire. Both the lock and main weir are connected to De Bohun Island. The Thames Navigation Commissioners built the original lock in 1778. Additional sluices north of View Island and Heron Island form the whole weir complex. A footbridge, known as The Clappers, passes over the weir and all three islands to connect Lower Caversham to Reading. The weir is upstream of the lock and in the mid-channel.