London’s newly re-opened Postal Museum – www.postalmuseum.org – now includes the ‘thrill’ of a ride on the capital’s Mail Rail through tunnels that have lain abandoned for years.

The underground system transported letters and parcels 6½ miles from Paddington to Whitechapel , for over 75 years – from the 1920s until its closure in 2003 – linking six sorting offices with mainline railway stations and delivering four million letters every day.
With that in mind Robert Draper of Bath writes: “Is there a lesson here for Bath to help alleviate our traffic problems? ………….
BTW….

There is a narrow track underground railway beneath Milsom Street going roughly between Waterstones and the Octagon.

I remember, from Octagon Theatre Club days, the line being blocked by a breeze-block wall, probably by a bank nervous of acquisitive Bathonian villains breaking into their vaults!”