A Travelling Post Office (TPO) was a type of mail train used in Great Britain and Ireland where the post was sorted en route.
TPO at the Colne Valley Railway. Visible to the right of the Royal Mail logo is the letter box, for first class post only.
TPO interior
A 1895 cover postmarked on the London & Holyhead TPO to be placed on board ship at Queenstown, in Cork, per the manuscript annotation
British Rail TPO vehicle NSA 80390 on display at Doncaster Works open day on 27 July 2003. This type of vehicle, based on the British Rail Mark 1 coach, was the final design of TPO vehicle used in the United Kingdom.
Rail Express Systems (RES) was a sector of British Rail. This sector was responsible for transport of mail and parcels, including the travelling post office trains, as well as taking over charter operations from InterCity and haulage of the Royal Train.
Rail Express Systems livery as carried by 90016 at London Liverpool Street in March 2004
Rail Express Systems livery as carried by Propelling Control Vehicle no. 94335 stabled at Plymouth on 29 August 2003
British Rail TPO vehicle NSA 80390 on display at Doncaster Works open day on 27 July 2003. This type of vehicle, based on the British Rail Mark 1 coach, was the final design of TPO vehicle used in the United Kingdom.
Image: 31284 at Saltley on 25th April 1987