The Postal Museum is a postal museum run by the Postal Heritage Trust. It began in 2004 as The British Postal Museum & Archive and opened in Central London as The Postal Museum on 28 July 2017.
Wikipedia https://en.wikipedia.org/wiki/Postal_Museum,_London
Official Website https://www.postalmuseum.org/
Coordinates 51°31'27.642" N -0°6'46.568" E