 The tramways north and south of the River Thames were almost completely separate until the opening of the Kingsway Subway in 1908.From 1 July 1921 the LCC Tramways assumed operation of the Leyton Urban District Council Tramways trams.In 1933 the LCC Tramways had of tracks in operation, of which about nine were in Leyton, and a quarter of a mile owned by the City of London.