Harry Mercer is a guitarist and composer who has built a reputation for his contribution to the contemporary music scene within London.

He leads HM Trio, a group performing original music rooted in improvisation, and is preparing their debut release. As a sideman, Harry works with a range of forward-thinking artists across the UK jazz, rock, and electronic scenes, with recent appearances at venues including the Vortex and Cafe OTO.

In addition to his creative projects, Harry is an in-demand session and touring guitarist, with experience spanning studio work, co-writing, and major live performances. Recent credits include Village Underground, Reading and Leeds Festival, and the 2025 debut album by artist Beaux, with headline and international tour dates set for 2026.

Harry is also co-founder of Being Bill, a London-based collective curating cross-disciplinary events that connect communities across diverse musical and creative scenes.