Leslie Lake, founder of the famous Locke Brass Consort, and retired Bass Trombonist from the English National Opera. 

The Locke Brass Consort was founded in London, England, in 1966 by Leslie Lake. Lake has played the bass trombone in the English National Opera Orchestra since 1965. Initially, Lake brought together four other brass players to form a quintet, and the group typically gave concerts in schools and music organizations. In early 2014, following Leslie Lake’s retirement from the orchestra of the English National Opera, the group was reformed, with Leslie as Musical Director and Conductor.

Leslie is also a composer with his works published by Presto Music Lake, Leslie (composer) - Bass Trombone (page 1 of 1) | Presto Sheet Music (prestomusic.com)

The Trombonist Autumn 2009 by British Trombone Society - issuu

More biographical material to be transcribed.