Alison Balsom's late-night Bristol Prom 2015 This image appears in the gallery:Alison Balsom: Late Night Trumpet at the Bristol Proms 2015 8. Alison Balsom's late-night Bristol Prom 2015 Photo: Samuel Bay 17 images See the full gallery: Alison Balsom: Late Night Trumpet at the Bristol Proms 2015