"The Post Office underground railway – Mail Rail – ran
under the streets of London largely unnoticed for more than three quarters of a
century. Since 2003, the electrified railway has been
dormant, with just a handful of engineers to maintain it". The Guardian.
 |
Mail Rail train. Photograph: Bradley Photography |
"Mail Rail was approved by an Act of Parliament a century ago, and during
its heyday its driverless trains carried 12 million postal items daily
on the line stretching from East End's Whitechapel to west London's
Paddington". BBC
 |
Mail Rail |
"As part of a £22m plan for a national postal museum in central London,
the British Postal Museum & Archive is to open a section of Mail
Rail to the public for the first time in its history." The Guardian
 |
The descent to Mount Pleasant. Photograph: Bradley Photography | |
You can read more about it
here and
here.