There’s a grail, but it doesn't glow in a mundane if perverted Christian ritual. Three of the main characters have young and old actor versions and the “wonder-working spear” is a knife in a Cain and Abel story superimposed on Wagner’s myth (as if that wasn’t complicated enough). Kundry, whom the composer defines as literally flying between “good” and “bad” worlds, enters primly in the first two acts bearing a tea-tray.

Is Giulio Cesare in Egitto, to give the full title, Handel’s best and shapeliest opera? Glyndebourne’s revival of the legendary David McVicar production last year made it seem so, not least thanks to the presence of two of last night’s soloists, Louise Alder as Cleopatra and Beth Taylor as Cornelia. Highlight of 2022 was the English Concert’s more sparely presented Serse. This concert Cesare from that stable lived up to both standards.

Who doesn’t love the quirky, passionate and humanitarian genius of Leoš Janáček? All of it, these days. Since Charles Mackerras introduced the UK to a then-unknown, even the less familiar operas have had plenty of exposure. Simon Rattle was among the champions, giving an early concert performance (the UK premiere, I think) of the astonishing Osud (Fate). Now he's performing and recording them all with the London Symphony Orchestra.

Full marks to the Royal Opera for good planning: one first night knocking us all sideways with the darkest German operatic tragedy followed by another letting us off the hook with a short comedy by Wagner’s compatriot Telemann. The premiere of Pimpinone predates that of Die Walküre by nearly a century and a half and we mark its 300th anniversary this year. But is it too slight for resurrection?

Wagner’s universe, in the second of his Ring operas which brings semi-humans on board to challenge the gods, matches exaltation and misery, terror and tragedy – and throws down a gauntlet to singers, orchestra and director capable of going to extremes with due discipline.

Opera North have recently pioneered a way of presenting some big works which they call “dramatic concert stagings”, performing in concert halls as well as theatres, with the orchestra on the platform behind the singers and a minimalist set, and the principals in present-day costumes symbolic of characters’ type.

Some have had video projection as a backdrop, but it’s also been dispensable where necessary. This one has none, but the concept is much more than a concert performance and completely justified by its impact in theatrical terms.

Emotions run high at WNO these days. When the company’s co-directors, Sarah Crabtree and Adele Thomas, feel impelled to take to the stage at the end of the first night of Peter Grimes, in front of the entire company, chorus, orchestra and all, you know that matters have reached a pass that only a massive show of enthusiastic solidarity can hope to assuage.

It’s quite ironic that the Royal Northern College of Music should have invited, as director of this, Britten’s avowedly pacifist opera, Orpha Phelan – whose version of his Billy Budd for Opera North nearly 10 years ago contained one of the most thrilling battle scenes ever staged.

Just now, the notion of a long-term project that concludes in 2041 sounds like an optimistic bet on the far future worthy of some 18th-century Enlightenment philosophe – Voltaire’s Dr Pangloss, maybe. The musicians of The Mozartists are clearly hoping for the best in the best of all possible worlds, as their MOZART250 programme ambitiously tracks, in annual increments, the music that Wolfgang Amadeus wrote exactly 250 years ago.

So much looked promising for Irish National Opera’s first Wagner: the casting, certainly, the conductor – Music Director Fergus Sheil knows and loves this music – and the venue (the Libeskind-designed Bord Gáis Energy Theatre, proven ideal for Richard Strauss). How could a production go wrong with such a theatrical romantic tale, a pioneering music-drama for its time (1843)? All too easily, it seems, by either coming up with inappropriate business or letting the singers stand and deliver.