At the weekend I took part in a unique performance. The Bart’s Academic Festival Chorus and Orchestra meet to rehearse and perform in the hospital on the edge of the City from which they take their name. One of their activities involves single rehearsal-runs of operas or excerpts of operas and it was on this basis that I joined a handful of my colleagues to sing through the second Act of Wagner’s Siegfried. I was singing Fafner, the petulant giant who has been crippled by covetousness of the Ring of the opera’s cycle-title and can only sing tritones (almost). The performance in the remarkable Great Hall of Bart’s Hospital (above) was conducted by John Lumley.