London Underground regularly moved stock for the Northern City Line along the old lines between Highgate Wood Depot, Finsbury Park and Drayton Park Depot until September 1970. The movements ran regularly on Tuesdays, and occasionally on Mondays and Wednesdays. The tracks were removed in 1971 following which the Northern City Line empty stock movements ran from Neasden via King's Cross (York Road) and the Widened Lines. The sections of the line from Finsbury Park to the southern portals of the southern tunnels at Highgate station and between the sites of Cranley Gardens and Muswell Hill stations now form a linear urban park known as Parkland Walk. Stretches of the Mill Hill East to Edgware line are now local nature reserves: Copthall Railway Walk and Mill Hill Old Railway Nature Reserve.