Sometimes I go outside and look at our kitchen drain. Where there should be a vortex there’s a largely static pool. Tree roots have recently grown through the old pipes, their clumps colonised with fat, dog hair and coleslaw bits, and though a bit of handpumping will shift some of the stale water for a while, it really needs systemic attention from Dyno-rod. A good Dyno-rodding is what Chichester’s new production of Noel Coward’s The Vortex needs too.

Isaac Julien was a student at St Martin’s School of Art when the Brixton riots broke out. Black youths took to the streets, frustrated by high rates of unemployment, police harassment, far-right intimidation and media hostility, and all hell was let loose.

Is Korngold a second-rank composer with some first-rate ideas? Most performances of the 23-year-old Viennese prodigy's Die tote Stadt make it seem so. Nearly smothered in glitter and craft, the story can compel – an oblique, promising stance on Georges Rodenbach’s Bruges-la-morte, about an obsessive widower who thinks he sees his dead wife in a vivacious dancer. Does Annilese Miskimmon, ENO's semi-visible Artistic Director, carry it off?

Nearly 40 years old, Andrei Serban’s Royal Opera Turandot feels like a gilded relic (I felt like a relic myself on learning that my writer neighbour wasn’t born when I saw Gwyneth Jones as the ice princess in 1984). Yet so too, outwardly, did Puccini’s only really grand opera when it premiered in the 1920s, exoticism being mostly confined to operettas and musicals. What keeps it modern is the score, which made it vital to hear what Antonio Pappano had to say with it.

For many years, I would ask groups of students to vote in elections because “it’s important to honour those who gave up so much to ensure that the likes of us can”. Some would nod, others would shrug, a few might have inwardly scoffed – too cool for school, innit?

Two intriguing themes and two great guest artists were offered by the BBC Philharmonic to their Saturday night audience in the Bridgewater Hall: the themes were what “classicism” really is, and the variety of music inspired by (or written for) dance.

It’s good to think that there are some opera productions – not just compositions – that in themselves can have the status of classics. David Pountney’s 1980 interpretation of Janáček’s The Cunning Little Vixen must be high on a list of contenders for that accolade. It was first seen at the Edinburgh Festival that year, performed by Scottish Opera in a co-production between them and Welsh National Opera.

Babylon is sensational, a manic, pounding assault on the senses meant to convey Hollywood’s chaotic birth. Damien Chazelle’s return to La La Land’s showbiz dreams forsakes ineffable intimacy for hysterical thunder, and for much of the time that’s enough.

The cynical might think Pearl Cleage’s play had been expressly written to address the over-riding issues in today’s USA – abortion and contraception rights, gun control, homophobia, racism. But the cynical would be wrong, as Blues for an Alabama Sky was written in 1995. What is notable is its timely scheduling by the National Theatre.

Previous works by screenwriter-director Martin McDonagh, which include In Bruges and Three Billboards Outside Ebbing, Missouri, might give you an inkling of the perverse and tantalising mindset that lies behind The Banshees of Inisherin… but then again, perhaps not. You could call it a drama, or a comedy or a tragedy. You might even call it a parable.