The Lord-Lieutenant is Her Majesty The Queen’s representative in Greater London.
Issues relating to protocol and precedence can be clarified by consultation with the Lieutenancy Office.
How to address the Lord-Lieutenant
In writing: Sir Kenneth Olisa OBE, Her Majesty’s Lord-Lieutenant of Greater London
Salutation: Dear Lord-Lieutenant, or Dear Sir Olisa
In a speech preamble: “My Lord-Lieutenant”
Conversation (on formal occasions): “Lord-Lieutenant” or “Sir Olisa”