London's Underground Mail Rail

[cabby (Mista B)]

Some interesting photos of London’s underground Mail Rail.
Ralph

http://news.yahoo.com/nphotos/London-Underground-Mail-Rail-Discovered/ss/events/wl/042211ldnmailrail

[Great_Western (Alan Lott)]

http://www.mailrail.co.uk/

A bit more information.

[David_Marconi_FOGCH (David Marconi CHHNNG)]

Nice find Ralph

[Ray_Dunakin]

Very interesting.