On Sun, 06 Jun 2010 15:58:44 +0100 someone who may be john wright
wrote this:-

"When there was only one line for the whole of London" What can that
refer to? Neither telephones nor rail lines makes much sense in this
context.

Indeed.

The whole sentence is "At its nerve centre is a signal box first
fitted in 1928 – a relic from the first days of the network when
there was only one line for the whole of London."

I suspect that it is just bad journalism, mixing up things the
journalist was told. As background the journalist may have been told
that at one time Edgware Road was on the only underground railway
line [1] not just in London but in the world. However, that was a
long time before 1928.

The photograph shows a miniature lever frame box typical of the era,
particularly in London and SE England. If it has been well
maintained the lever frame should work well, though if the
components on the track are of the same era some may be giving
rather more trouble, though fish tank relays tend to be pretty
indestructible.


[1] in the sense of a railway running under city streets for an
extended distance with intermediate stations. There were earlier
underground railways, including the Liverpool and Manchester Railway
tunnels in Liverpool
http://www.subbrit.org.uk/sb-sites/sites/l/liverpool_edge_hill_cutting/index.shtml



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000...#pt3-pb3-l1g54