sentences:  From this point it is designated as a main river, and is therefore the responsibility of the Environment Agency.It flows to the south of the Clements Hall Sports Complex, to be joined by the Hockley Brook, which rises near Southbourne Grove, Hockley, flows under the Shenfield to Southend Railway and then alongside it, to the junction on the north side of Rectory Road.Now officially the Roach, it turns to the south east, passing under Rectory Road, and continuing to Rochford, running broadly parallel to Ironwell Lane.