Here is more about the system in London, with a nice pic of one of the little locomotives.[still running at a Railway museum !]
http://en.wikipedia.org/wiki/London...fice_RailwayOne of the stops en route was the massive Mount Pleasant sorting office.

This is also the home of the Postal Museum and archive and is well worth a visit if ever in London. If I am not mistaken, and I could be, one can see the 'station' from this mail rail.
This also the home of my UK Philatelic Club, the National Philatelic Society and it's wonderful Philatelic library is housed there.
Oh to be in London......
Londonbus1.....and all those Buses !
