In message , John Rowland
writes

I can't remember if this has been mentioned, but anyone concerned about the
endless tide of humanity plummeting head first off the roof of Arnos Grove
can be happy in the knowledge that the flow has been stemmed, thanks to LU
putting railings all around the edge. Fortunately, the station's beauty can
still be enjoyed in the many old pictures of it which exist.

They're only there temporarily to protect the workmen whilst the station
is refurbished. Sudbury Town has them too.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)