Prior to launching BLM in 1990, Lockett was a director of Saatchi & Saatchi and then a founding director of Zenith Media.
Booth and Makin, alongside other key figures such as chief operating officer Paul van Barthold, are committed to running the agency as a standalone operation within the Havas Arena network. Going forward, the agency will be known as Arena BLM.
Havas' acquisition of BLM follows interest in the independent agency from several potential buyers, including Engine Group, the owners of WCRS. Engine and BLM were close to signing a deal last year only for talks to fall through in their late stages.