From the more extensive Wikipedia page [1] The Prescott Channel was built in 1930–35 as part of a flood relief scheme for the River Lee Navigation in the East End of London, and was named after Sir William Prescott, the then chairman of the Lee Conservancy Board. Rubble from the demolished Euston Arch was used in 1962 to improve the channel, which forms part of the Bow Back Rivers, Bow Creek provided the final outfall to the Thames, and the other channels were called Abbey Creek, Channelsea River, City Mill River, Pudding Mill River, Three Mills Back River, Three Mills Wall River and Waterworks River.