Mark Morris, the most musically communicative and naturally lyrical of choreographers of the past 30 years (and an absentee from London theatres for too long), made L’Allegro, il Penseroso ed il Moderato, a dance masterpiece of a Handel oratorio using John Milton’s words. It was a miracle of pastoral sweetness, in rustic, human, amorous dancing, bodies singing the words and all the orchestral folderols too.