It’s always tempting, at curtain-up in La Traviata, to settle back, half-close one’s eyes, and soak up the familiar without the anxiety of the new. Not this time you won’t. David McVicar’s lavish 2009 text-true staging is being revived with a generally strong, stylish and dependable cast.

Britten’s biggest cornucopia of invention seems unsinkable, and no-one seeing his breakthrough 1945 opera for the first time in this revival will fail to register its forceful genius. David Alden’s expressionist nightmare of a production, though, has never seemed to me to hit the heart of the matter. And though musical values are strong, ENO music director Martyn Brabbins doesn’t always keep the tension flowing.

What a difference a few years make. In 2019 I reviewed composer Dani Howard’s first opera, Robin Hood, also produced by The Opera Story, and commented on the fundraising success that enabled a cast of six and an ensemble of 10.

Let’s set aside, to begin with, the question of the concept, other than to praise it as consistent. Most vital about this brave new Rheingold is the vindication of director Barrie Kosky’s claim that “what makes a Ring production interesting is the detailed work within the scenes between the characters”. With a conductor as intent on clarity and meaning as Antonio Pappano, and a true ensemble of performers willing to go along with him and Kosky, the battle is three-quarters won.

I find it hard to know quite what to make of Ainadamar, Argentinian composer Osvaldo Golijov’s one-act opera about the life and death of the Spanish poet Federico Garcia Lorca, who was murdered in unknown circumstances – probably by Nationalist militia – in the early months of the Spanish civil war in August 1936.

It’s one of the great tragedies of Les Troyens that its composer never got to hear it performed in its entirety during his lifetime. This ravishing, big-hearted interpretation of the two of the most dramatic episodes in Virgil’s Aeneid was dismissed by orchestras that could not comprehend its technical or emotional demands, with the consequence that there was no attempt at a proper staging till 21 years after Berlioz's death.

This was one of the more strait-laced concert performances, with few concessions to Wagner’s underlying stage drama. The soloists were in formal concert dress, strung out in a line at the front of the stage, with interaction between them limited to looks of anguish and the sparest of gestures. The shepherd boy in Act 1 was banished to the upper reaches of the organ gallery, and there was a substantial off-stage band in Act 2, but otherwise there was nothing to distract us from the music.

György Kurtág is 97 and the last man standing of the post-war generation of avant-garde composers. Last night the Proms staged the UK premiere of his first opera, started in his eighties and premiered in 2018, a setting of Samuel Beckett’s typically mystifying play Endgame. Sadly, for all the brilliant passages of orchestral writing, and top-notch singing and playing, as an opera it’s a bit of a damp squib in which some minutes hung heavy.

“There will be more incense,” promised Glyndebourne Music Director Robin Ticciati of the company’s annual visit to the Proms. He was talking to my Opera Zoom class between the final rehearsal and first performance of Poulenc’s great masterpiece about the martyrdom of Carmelite nuns during the French revolution, as directed by Barrie Kosky with unsparing horror and humanity. And now here was the operatic company of the year taking its final bow after a sellout run in Sussex.