The music hit me first in a great gloomy wave, followed by the scale of the theatre. A great horseshoe rose up in tiers of gilt and red velvet. Ahead of me a sea of heads swept down to the orchestra pit and beyond them to the stage. The set depicted the back end of a sailing ship, although the scale was exaggerated to the point where the gunwales towered over the singers. Everything was painted in cool shades of blue, grey and dirty white – a ship adrift in a bitter ocean. The music was equally sombre, and could really have done with a back-beat or, failing that, a girl in a miniskirt. Men in uniforms and tricorn hats were singing at each other while a blond guy in a white shirt looked on with doe eyes. I had a funny feeling that it wasn’t going to end well for the blond guy, or the audience, for that matter. I’d just worked out that the tenor was playing the captain when the bass, playing the villain of the piece, faltered. I thought at first that this was part of the performance, but the murmur that ran through the audience made it clear it was a mistake. The singer tried to recover, but was having trouble remembering his part. The tenor stepped up to ad lib, but faltered himself, and with an expression of pure panic looked off the stage towards the wings. The audience was starting to drown out the orchestra who, having finally twigged that something was up, crashed to a stop.

I started down the aisle towards the orchestra pit, although I had no idea how I was going to get to the stage. A few of the audience had stood up and were craning their necks to see what was going on. I reached the edge of the pit and glanced down to see that the musicians were still poised over their instruments. I was close enough to touch a lead violinist. He was trembling and his eyes were glazed. The conductor tapped his baton on his music stand and the musicians started playing again. I recognised the music as the first tune sung by Mr Punch in the Piccini script, it was Malbrough s’en va-t-en guerre, an old French folk song, but in the English speaking world it was For He’s a Jolly Good Fellow.

The tenor playing the captain picked up the refrain first:

Mr Punch is a jolly good fellow,

His dress is all scarlet and yellow.

The bass and baritone joined in in quick succession, followed by the company, singing as if they had the song sheet before them.

And if now and then he gets mellow,

It’s only among good friends.