If British theatre often seems to lack ambition, the same cannot be said of The Half God of Rainfall, a galaxy-hopping mythological mash-up. Written by Inua Ellams, whose Barber Shop Chronicles was a big foot-stomping hit for the National in 2017, this epic story trips across the globe and the sphere of myth, combining Yoruba gods with ancient Greek deities.

Many groups have based their career focusing almost completely on one thing and evermore honing it. Bands ranging from The Ramones to the Cocteau Twins to the Black Keys to even the Foo Fighters could arguably be said to follow this remit. Swedish metallers Amon Amarth certainly do. Since 1992 they have been creating Viking-themed metal and for their eleventh album, they are not about to change things.

Stopped in the street for a vox pop by a BBC interviewer keen to “fill your air” with strife and bile, a character in Spring retorts that “there’s a world out there bigger than Brexit, yeah?” Newshound critics, take note. The symbolically named Brit (short, originally, for Brittany) works as a guard at a migrant detention centre. In its hellish corridors, people driven by suffering, abuse and terror out of regions much less favoured than navel-gazing Europe endure routine contempt and cruelty in a “kind of underworld”, a “place of the living dead”.

Hel, heroine of Gavin Higgins and Francesca Simon’s new opera, is the illegitimate daughter of the Norse god Loki. In many ways The Monstrous Child itself feels like a bastard offspring, born – moody, mouthy and full of fragile rage – to Wagner’s Ring Cycle and Skins or possibly 13 Reasons Why.

Harpers on the undeniably offensive aspect of Wagner the man might question attending a concert performance of his second Ring opera on World Holocaust Day. Fortunately there's nothing anti-semitic to be found anywhere in Die Walküre.

Two years after the release of Fantastic Beasts and Where to Find Them, we return to the Wizarding World once again for the next, somewhat convoluted, chapter in the five planned prequel instalments, with Fantastic Beasts: The Crimes of Grindelwald.

The road to full musical theatre production has been a long one for Hadestown. It began back in 2006, with Anaïs Mitchell’s song cycle – a folk/jazz take on the Orpheus and Eurydice myth – toured around Vermont in a school bus, then grew into an ecstatically received concept album in 2010, and has gone through further development with director Rachel Chavkin in Off-Broadway and Canadian stagings.

And so it ends. Flames give way to water, and as the Rhinemaidens resume their naked dance we come full circle – quite literally in Keith Warner’s Wagner Ring – back where we began, on the banks of the Rhine. Once again we find ourselves on the brink – but of what? A young woman framed in the giant ring that descends in the music’s final moments suggests a hopeful new beginning, a new generation of heroes.

Siegfried is usually the problem with Siegfried. Even Stuart Skelton, top Tristan and currently singing an acclaimed Siegmund in this last revival of Keith Warner's rattlebag Ring, won't touch the longest, toughest heroic-tenor role in Wagner, the protagonist of his third opera in the tetralogy.

Perched alone and fearful in her hut as the curtain rises on Die Walküre, Sieglinde clutches and then throws aside a grimy teddy-bear. Story time is over. The nymphs and gold and bickering gods all belong in the past, to the ‘preliminary evening’ of Das Rheingold, or so Sieglinde might think. The real drama of Wagner's Ring begins here.