We start with a scene in which Ncuti Gatwa appears in a slinky dress in the middle of what appears to be a gay party. Then the curtain goes up on Oscar Wilde’s actual play, but with added text, added gestures and added modern touches.

Whenever Max Webster’s production sticks to the text, it works really well.  The central character Algernon is a kind of proxy for Wilde himself: decadent, amoral and bubbling over with cynical epigrams. Even people who have never seen the play before will probably know some of them, such as ‘In matters of grave importance, style, not sincerity is the vital thing.’

Ncuti Gatwa is a very good Algie: cool, laid back, with a mischievous smile, which he often employs in the direction of the audience. He delivers those epigrammatic lines as they are meant to be- clear and confident, defying argument. That he wears colourful tight-fitting clothes and poses like a cat is all we need to suggest a fluid sexuality. But we get a lot more.

His friend Earnest is played by Hugh Skinner projecting the same kind of puppyish naivety he brought to the character Will in W1A. Both the young men have secrets that will inevitably be exposed.

Earnest, whose real name is Jack, is in love with Algy’s cousin Gwendoline. The main obstacle to their marriage is her mother Lady Bracknell who cross examines him for suitability and discovers that he was abandoned as a baby in a railway station in a handbag, leading to the most famous two word line in theatre history.

With all due respect to other members of the cast, Sharon D Clarke is the saviour of the evening. Her Lady Bracknell is every bit as imperious and formidable as she should be, which of course is what makes her pronouncements about the rules of society so funny. You know the sort of thing: ‘Fortunately in England, at any rate, education produces no effect whatsoever.’ Making the character Caribbean in origin is inspired. Her slight lilt gives extra weight to every word. She is as good as any Lady Bracknell I’ve seen, including the legendary Judi Dench.

Before long, Algy too is in love with a woman, namely Jack’s ward Cecily. The girls have in common that they can only love a man named Earnest. I won’t say any more about how the plot rolls out and resolves, in case you’re unfamiliar with it.

Part of the joy of Wilde’s dialogue is that you are left in no doubt that the young women are physically attracted to the men, and more predatory, without actually saying it. Yet, Ronkẹ Adékọluẹ́jọ́ and Eliza Scanlen as Gwendoline and Cecily respectively are required by the production to make clear their sexual arousal with shuddering bodies and flicking tongues. Gwendoline rolls her eyes and gives the audience lascivious looks, while Cecily talks like Miranda Richardson playing the randy Queen in Blackadder.

Far from trusting the audience to pick up the subtext, bits of business are added throughout. And I’m hard pressed to find one addition that doesn’t actually take away from the play’s effectiveness. Here are some examples. To a list of overdue bills from The Savoy is added Dalston Superstore (a contemporary gay bar). When Algie and Jack come through a door, they are singing James Blunt’s You’re Beautiful. Faced with having to ask Lady Bracknell for help, Jack mutters ‘crap’. The celibate Canon Chasuble and Miss Prism, played with gentle affection by Richard Cant and Amanda Lawrence, won’t admit they are attracted to one another. Their skirting around the subject is what makes their relationship amusing, not Canon Chasuble hiding an erection under his hat, which belongs in a 1970s farce. When volumes of books which each cover a letter of the alphabet are picked out, the first three are G A and Y. Subtle it ain’t.

I’m fully at ease with modernising classics. It can breathe new life in them, it can add to our understanding of them. And I also think it’s great that we should honour Oscar Wilde as a gay man who courageously exposed Victorian hypocrisy and was persecuted for it. I like challenging work but, frankly, this production does Wilde and the audience – even non theatregoing Whovians- a disservice by seeming to treat the play as if it’s too subtle for its audience to appreciate.

This production is running over Christmas which may explain the decision to turn it into an adult pantomime. In fact, it’s great fun if you ignore the assault on the play. There’s even a panto style walk down in which all the cast wear glittering sexy costumes and enter to beat music, encouraging clapping along rather than applause.

By the way, all the dazzling costumes and the sets, designed by Rae Smith, are fabulous. They are recognisably Victorian  within a false proscenium arch, so the design pays homage to the style of a late Victorian stage play while using bright light and colour to open it up, in a way that the direction aspires to but doesn’t.

Oscar Wilde triumphs despite the production, thanks to Ncuti Gatwa, Hugh Skinner and Sharon D Clarke doing justice to his witty, perceptive script.

The  Importance of Being Earnest is at the National Theatre until 25 January 2025. Tickets from nationaltheatre.org.uk

Read the roundup of other critics’ reviews here.