Elstree South was a proposed tube station, part of the cancelled 1940-era New Works programme. Delayed by the Second World War, the post-war Green Belt made the line unviable.
The whole scheme would have extended the line from Mill Hill East with stations at Mill Hill (The Hale), Edgware, Brockley Hill, Elstree South and Bushey Heath.
From Mill Hill East, an existing railway to Edgware would have been followed.
Running north from Edgware station, the projected route north is still quite obvious on Google Maps satellite view - with different housing and narrower streets.
Some initial viaduct work could be seen until recently near to the Spur Road roundabout. After here the line would have climbed considerably in altitude to reach a new Brockley Hill station.
Elstree South station would have had an adjacent depot - this was completed and became Aldenham Bus Works instead.
Finally the route would have reached Bushey Heath where the Northern Line extension would have terminated.
Mill Hill (The Hale) mug:
https://the-underground-map.myshopify.com/products/mill-hill-the-hale-mug-retro
Edgware mug:
https://the-underground-map.myshopify.com/products/edgware-mug-retro
Brockley Hill mug:
https://the-underground-map.myshopify.com/products/brockley-hill-mug-retro
Elstree South mug:
https://the-underground-map.myshopify.com/products/elstree-south-mug-retro
Bushey Heath mug:
https://the-underground-map.myshopify.com/products/bushey-heath-mug-retro
