Mark Wigglesworth returns with a poignant program featuring Britain’s finest musical geniuses. Tenor Nicky Spence takes the spotlight alongside the strings in Benjamin Brittens Les Illuminations. Igor Stravinsky paints a masterful mosaic in which winds and brass flow between fanfares, folk-tunes and a somber final chorale, all dedicated to the memory of Claude Debussy. Saturday at 7:30 p.m. and Sunday at 2 p.m. Tickets range from $40 to $120.