A director of English National Opera has apologised for booing a colleague at the end of a public performance.
The apology arises from an incident at the London Coliseum on 13 May
Director of marketing Ian McKay shouted derision after a performance of Lulu on 13 May when the ENO's departing music director Paul Daniel came on stage.
Audience members complained to front of house staff at the London Coliseum.
"I now realise that my actions were inappropriate and I express my regret to the audience if I distracted them from their enjoyment," said Mr McKay.
He was asked to explain his actions to the ENO's artistic director Sean Doran and its executive director, Loretta Tomasi.
Mr McKay said he had been angered by a newspaper article in which Mr Daniel had spoken about the ENO's future.
"I believed [the interview] damaged the company's reputation," he said.
The performance of Alban Berg's opera on 13 May was Paul Daniel's last after eight years as music director and chief conductor.
His successor, Oleg Caetani, takes up the post in September 2006.
In the interview, printed in the Guardian on 22 April, Mr Daniel had questioned whether the ENO's chairman Martin Smith was the right man for the job.
"The company's not with him," he was quoted as saying. "And I fear the public's perception of the company is slightly tainted by him."
Mr Daniel also expressed concerns about Mr Doran's plans for the company, which include giving surtitles to all of its operas.