BIRMINGHAM Arts Centre, mac, near Edgbaston cricket ground, is having a busy week of performances. Tonight, Friday and Sunday, Purcell's Dido and Aeneas is being staged mixing English and Asian traditions. On Saturday, July 23, singer-songwriter Richard Thompson is taking the stage and next Saturday, July 30, Scottish singers The Proclaimers take the limelight. For information call 0121 4403838.