On Mon, 14 Apr 2008 14:40:04 -0700 (PDT), Mr Thant wrote:

On 14 Apr, 22:23, "Railsigns.co.uk" wrote:
There's an elevated Limit of Shunt signal at the Richmond end of the
Up platform (no. GB507). As you say, there are no routes reading up to
it. It's fitted with a trainstop and it's there to prevent trains
setting back wrong road to Richmond without authority.

And you can see a photo of it on page 15 of this 5 MB PDF:
http://www.irse.org.hk/chinese/newsl...ary%202007.pdf

And also a comprehensive explanation.



There's also this page:
http://www.trainweb.org/districtdave...nnersbury.html

which explains more about the reversing move back to Richmond, from an LU
point of view, although it does not mention the 'LOS'.


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WZR