Pegasus Opera aims to provide opportunities for artistes of diverse backgrounds and to promote opera in under-served and culturally diverse communities. To this end, it provides educational programmes for thousands of young people in London and the regions. It also stages productions, this time a double bill of two short operas by the American (b 1932) composer Philip Hagemann, who also conducted. Of the two works performed at the new Susie Sainsbury Theatre at the …