Designed by Leo Maggs. Initially drawn in c. 1964 or 1965 at Hazell Sun Group’s design studio for an article in About the House, the magazine of The Friends of Covent Garden Opera House. Maggs based his all-caps lettering on the numerals of the E-13B MICR typeface, and later completed the alphabet, “based […] on the classic proportions of Gill Sans”. Rejected by Letraset, but produced by Photoscript Ltd., including a lowercase. [S. Mercer] Release date unknown. It is shown in the 1968 Photoscript catalog. Depicted in Lettera 4 as Programm (with descending ‘J’ and narrow ‘V’, unlike in the digital Westminster).

Named by Robert Norton of Photoscript. According to Microsoft, Westminster was named “after the bank that helped Photoscript fund the font's production.”

Later passed on to Berthold. Appears in their E1 Fototypes catalog. In 1993, it was licensed to Microsoft and a digital version produced by Eraman, Ltd. and Type Solutions, Inc. was bundled with Windows 98.