Britten Sinfonia also perform Schubert’s most Mozart-like symphony, filled with grace and invention, Elena Kats-Chernin’s high-tempo opener, and Robin Haigh’s superb Grin, commissioned by Britten Sinfonia and winner of an Ivor Novello Award, which brilliantly conveys “brutality through frivolity”, its light and cheerful music with echoes of Richard Strauss run through a dark “millennial haze”.