Rarely has a play's opening been so opportune. Just when it looked as if the West End was slipping into decline, along comes the smart, shrewd Backstairs Billy to allay mounting fears of late that the commercial theatre had lost all sense of quality control. (The offending titles know who they are.)

It was interesting, in the same week that the England football team trounced Italy 3-1 in a Euros qualifier, to see Dear England again, the National Theatre smash that has just embarked on a West End run at the Prince Edward Theatre.

Unbelievable is a strange title for a slightly strange show, the brainchild of Derren Brown, Andrew O’Connor and Andy Nyman, a trio with an impeccable pedigree in creating successful magic-based events. 

It's rare that a new musical or play opens in the West End with as much positive word-of-mouth as The Little Big Things. Social media has been ablaze over the last few weeks, with critics and bloggers sneaking into previews and authoritative big names hailing a new hit long before the official press night.

As an actor, Mark Rylance specialises in outsiders and eccentrics, outliers of one kind or another. He identified and developed his latest character himself, based on the real-life, mid-19^th century Hungarian doctor whose pioneering, lifesaving discoveries were long ignored by the medical Establishment – who in his lifetime was a tragic pariah rather than the hero he should have been. 

Who says you can't go home again? As proof that you can, and to giddy and gorgeous results, along comes the current West End revival of Crazy for You, which reunites Broadway name Susan Stroman with the Gershwin-inspired title that launched this singular talent on her career ascent more than 30 years ago. 

Whining Donald Trump and snivelling Boris Johnson claim that they are victims of witch-hunts, although all the evidence suggests otherwise. In 1953, haunted by the iniquitous McCarthy trials that were designed to purge the US of communism, Arthur Miller turned to a real travesty, that of the Salem witch-hunt of 1692.

There are a few perils to saying supercalifragilisticexpialidocious, as Janette Manrara discovered on this opening night of Disney’s anniversary arena jaunt. Trying to divide the Glasgow crowd into sections to sing the song, Manrara tripped over who was to sing what, something only notable because the rest of the evening was possessed of an almost overpowering slickness.

Love may change everything, as we're reminded multiple times during Andrew Lloyd Webber's rabidly polyamorous Aspects of Love, but certain things about this 1989 London hit (and subsequent Broadway flop) are fixed.

Can lightning strike twice? Very much so, when it comes to Shirley Valentine, Willy Russell's much-revived solo play which I saw back in the day with its London and Broadway originator, Pauline Collins, who went on to receive a 1990 Oscar nomination for the film. Now along comes Sheridan Smith, who is very nearly the same age as the unhappy Liverpudlian housewife and mother who, age 42, reluctantly travels to Greece and into a new life.