Steve Fitzgerald wrote:

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.

No chance of the Sudbury Town refurb reinstating the original neon signage
unfortunately :-(