It's Britten outside-in time for English National Opera. Regent's Park Open Air Theatre, which played host earlier this year to an only partially convincing production of his 1950s masterpiece The Turn of the Screw, would have been the perfect choice for the prelapsarian American forests of his pre-Grimes operetta/musical Paul Bunyan.

It was all about the acoustic. Well, almost. Disregarding the awe-inspiring grandeur of the Royal Albert Hall, there’s a school of thought that believes the Proms is the world’s greatest concert series in the world’s worst hall. Why? Because its problematic acoustic is so ungovernable.

“It has a music of its own. It produces vibrations.” Oscar Wilde was being ironic when he had Gwendolen contemplate the sound of her beloved’s drab name in The Importance of Being Earnest, but he had a point when it comes to composers and poetry. With their own “vibrations”, great poems rarely warrant musical interference; bad poetry, meanwhile, can resist even the finest scoring.

Once the Proms season is under way, you soon regret dissing the prospectus.

Opera and music theatre have set the birds shrilling in Regent's Park before in the shape of Gershwin's Porgy and Bess – a very forgettable production – and Sondheim's Into the Woods – much better, and a score which can give any 20th century opera a run for its money in terms of thematic interconnection.

“What angel wakes me from my flowery bed?” Hang on a minute, Tytania, there are no flowers. Instead, as Britten’s ominously low strings slither and tremble up and down the scale, the curtain rises on a huge, near-acidic emerald green hilly slope lying against a seemingly fathomless International Klein Blue cyclorama broken only by a glowing crescent moon. Except it’s not just a hill: it’s also a giant bed; the perfect bed, in fact, in which to spend one wonderful midsummer’s night.

Bach: Keyboard Concertos, Italian Concerto Sonya Bach (piano), English Chamber Orchestra/John Mills and Stephanie Gonley (leaders) (Rubicon)

Ten days ago I reviewed the First Night of the 2017 Proms. Last night I was back at the Royal Albert Hall to hear the First Night of the 1966 Proms. This time-capsule experience was courtesy of a re-enactment of Sir Malcolm Sargent’s 500^th Prom, in what turned out to be his final season. It gave an idea of Sargent’s musical tastes – middle-of-the-road classics and English music – and, in places, of his famously audience-pleasing conducting style.

“The subject is neither political nor religious; it is fantastical” wrote Verdi to the librettist Piave about his opera Macbeth. “The opera is not about the rise of a modern fascist: nor is it about political tyranny. It is a study in character” adds director Elijah Moshinsky in the programme for this opening production of the 2017 Buxton International Festival.