Alison Balsom's late-night Bristol Prom 2015 This image appears in the gallery:Alison Balsom: Late Night Trumpet at the Bristol Proms 2015 6. Alison Balsom's late-night Bristol Prom 2015 This drum was also whacked quite impressively. Photo: Samuel Bay 17 images See the full gallery: Alison Balsom: Late Night Trumpet at the Bristol Proms 2015