Parabola Arts Centre, CheltenhamFour years ago, Birmingham Contemporary Music Group introduced David Sawer's Rumpelstiltskin, which he designated a ballet, but defied precise categorisation. Now Sawer has come up with a companion piece, equally slippery to define. According to the composer, The Lighthouse Keepers is a "play for radio", a retelling of a turn-of-the-20th-century Grand Guignol text. A father and son are…
