This week Royal Mail began trialing parcel deliveries at several modified pillar boxes throughout Leicester and Northampton. We want to know, in which decade did the first Royal Mail pillar boxes appear in the UK?

The first pillar box in the UK was installed at Botchergate, Carlisle, in 1853. An ornate pillar box was later designed for use in London and other large cities in 1856. In 1859 the design was improved, and this became the first National Standard pillar box.