It’s a rare national culture festival that presupposes its audience will have no knowledge whatsoever of the culture concerned - or even be able to locate the country itself on a map. But that, we must assume from the “Azerbai-where?” promotional bus ads, was the starting point last November for organisers of the BUTA Festival of Azerbaijan Art, a series of very well-connected art and music events in London going on this month. Realistically, until petrol starts to be sold with a “produce of” notice, the country’s brand recognition looks set to stay on the low side.

"So, we made it eventually." Having postponed this show two weeks ago due to the M1 doubling as a skating rink, Richard Hawley opened not with a song but an apology. It was hardly necessary. The sold-out Royal Festival Hall last night was prepared to forgive Sheffield's second-finest songsmith - after his chum Jarvis Cocker - almost anything.

Eliot's "time future contained in time past" has been conductor Vladimir Jurowski's unofficial motto throughout a festival which has had to take itself very seriously, and managed miraculously to carry a surprisingly large, loyal audience of all ages and persuasions along with it. Such stringent conditions could hardly be otherwise given the focal point of an uncompromising genius.

Bryn Terfel is a good guy. I know; he never forgets a face, and I’ve seen him making the tea for the entire team at a recording session – no one-off, they assured me. Yet the nature of the bass-baritone beast is given over to more villains than noble souls. The "bad boys" of opera and musical theatre are grist to Terfel’s satanic mill in his latest CD-linked tour. Although inevitably given the demands of live performance there’s less than meets the ear on the disc, Bryn as dark god in concert gives far more than those recent short-shrifting divas Fleming and Gheorghiu.

The famously tempestuous Romanian soprano is, we learn, living a separate life from her husband Roberto Alagna. If Opera's Most Romantic Couple is no more, will Brand Angela be terminally damaged? Surely a showcase performance in the South Bank's International Voices season would be just the thing to rally the faithful and reaffirm Ms Gheorghiu's spectacular star quality, but I must admit that by the time we reached the interval, I was beset with gnawing doubt.

The irony won’t have been lost on many in the audience that the South Bank’s International Voices series began with Ballet. A whole first half of it, actually. Just as well the diva-in-waiting – the almost indecently glamorous Renée Fleming – knows the value of expectation and anticipation. Her very first album was entitled The Beautiful Voice and if that isn’t pressure for a burgeoning career I don’t know what is.