Is it true that in UK there are little tunnels for letters?

Question

Are there little underground tunnels going round UK, or maybe just in London, which have miniture trains/trolleys shuttling letters around for the Royal mail?

Answer 1

There was, built in 1927 between Paddington and Whitechapel in London, it was closed in 2003.

Answer 2

could be, I wouldn't put it past the British :)

Answer 3

The London Post Office Underground Railway (now mothballed, unfortunately) was intended to reduce the number of road vehicles which moved mail between the main sorting offices in central London. It was controlled from Mount Pleasant sorting office where there was a signalbox, and where the driverless trains were maintained. Because most of these have been closed (sorting for NW1 is now done in the Greenford mail concentration centre, for instance) the necessity for this facility was no longer needed.

When the Princess Royal hub at Willesden was opened (an articulated lorry arrives every 90 seconds, more frequently in  December) there was a short-lived proposal to extend the POUR from Paddington to the site along the route of the Bakerloo line.

Royal Mail publicity department produced an illustrated poster showing how the railway worked: it can be seen in the public enquiry room at Wembley postal delivery office.

Answer 4

Upto recently there was indeed one that ran across London, purely to transport the post.

  

I am not sure if it closed down now, I think that it has.