Stumbling across a Lost River in the Lea Valley London

A sunny Bank Holiday walk from Blackhorse Lane Walthamstow beside the Banbury Reservoir then onto the Lea Navigation at the North Circular. We then follow the Lea through Enfield until we pick up the Mossops Creek near Brimsdown and cross Mossops Creek footbridge. The Mossops Creek was dug by gravel extraction company Mosses and Co in the 1890s, presumably to link their works with the Lea Navigation.