"One of my most enjoyable roles in music was conducting the Herefordshire Young People's Orchestras (UK) in the late 1980s. Stuart Essenhigh was a very talented young trumpeter who toured Belgium with the orchestra as a soloist in 1989. Encouraged by this experience Stuart went on to study in London graduating as a fine professional trumpeter working firstly in Hong Kong and then as a freelancer with major U.K. orchestras. My TRITONE Sonata for Trumpet and Piano of 2016 was written specifically for Stuart. Each of its three movements uses the interval of a tritone in different ways. We hear it initially as a `benign' element of the first movement; `ironic' in the second and even `playful' in the last."