(c) Royal Mail Group Ltd 2013, courtesy British Postal Museum & Archive

Mail Rail could be opened to the public, after the British Postal Museum & Archive applied to the local council for planning permission to alter the underground railway under Mount Pleasant in London.

The planning application seeks approval for part of the tunnel, ground level workshops and the car maintenance depot at Mount Pleasant to become part of a ‘visitor experience’ and museum. The new areas would contain an exhibition on how Mail Rail operated.

The museum describes the potential granting of planning permission as ‘a significant step towards the BPMA’s goal of opening up a new museum and visitor experience at Mount Pleasant’.

The scheme suffered a setback after a disastrous auction of duplicate sheets in July, but museum officials are keen to press on and raise funding by different methods.

Mail Rail is the world’s only purpose-built underground mail transit system, and operated from 1927-2003. At its peak, the network operated for 22 hours a day, and would carry up to 4 million letters a day.