Liveryman
A "Liveryman" is a member of a livery company in the City of London, which are historic trade associations. These companies originated in the medieval period and were established to regulate trade practices, maintain standards, and support their members. Liverymen often have a role in the governance of their respective companies and may participate in various ceremonial functions.
To become a liveryman, one typically needs to be a freeman of the city and have a connection to the trade or profession represented by the livery company. Liverymen enjoy certain privileges, such as the right to wear the company’s livery and participate in events, including those involving the Lord Mayor of London.