Post box on the side of a Post Office train, 1993.
© National Railway Museum / Science & Society Picture Library -- All rights reserved
Post box on the side of a Post Office train, by Chris Hogg, 1993. Post Office trains had been used since the coming of the railways. The letters were often sorted in the train and dropped off at their destination. However, Post Office trains were withdrawn on 10 January 2004, due to a decline in the numbers of services required.