St Matthew Passion, National Theatre
It's not like we're short of operas. Thousands of works spanning over 400 years make up the western operatic repertoire. Of these maybe 100 get a regular airing in contemporary opera houses, with only about 20 making it into the popular consciousness. For the rest, a trip outside the archives is rare indeed, with many scores still vainly awaiting their "modern premiere". So why then, with so many works to choose from…