This year’s Free Prom is a Bank Holiday matinee from the Ulster Orchestra, bursting with dance rhythms and colour. A selection of Dvořák’s rustic Slavonic Dances opens the concert, and Grieg’s piano concerto with its jaunty dance-themed finale continues the mood. The evening ends in the orchestra’s musical heartland with Bax’s tone-poem Roscatha and Bill Whelan’s new Riverdance suite – adapted from his music for the ever-popular stage show.