If you are ever in London, this place is amazing: https://www.postalmuseum.org/visit-us/what-to-expect/mail-rail/ https://www.postalmuseum.org/visit-us/what-to-

If you are ever in London, this place is amazing: https://www.postalmuseum.org/visit-us/what-to-expect/mail-rail/ https://www.postalmuseum.org/visit-us/what-to-expect/mail-ra...