Kev wrote:
Coming down the Holloway Rd at the Archway end yesterday morning the
traffic was moving very slowly so I was looking around and saw what
looked like old railway track in an alley way between two shops.

I believe it is nothing more than old tram track. At the Highbury corner
end of the Holloway road, there should be an old tram shed (now a pub)
with plenty of old track still in place.

ESB