Everybody’s been talking about Everybody’s Talking About Jamie since its Sheffield Crucible debut earlier this year. It’s unusual to see a musical come steaming into the West End based on word on mouth – not star casting, or association with an existing franchise.

I’d always wanted to write a musical, but I didn’t start actually trying until four years ago. Now four years on, my first show, Everybody’s Talking About Jamie, is about to hit the West End –  that’s four years to go from no show, no idea and no experience to opening at the Apollo Theatre. It’s utterly crazy, I still can’t believe it – and this is how it happened...

A hit on Broadway, David Ives’s steamy two-hander now boasts Natalie Dormer and David Oakes, well-known for their screen work, in its West End cast, with Patrick Marber on directing duties.

In a rather clever wheeze, Dominic Dromgoole, former artistic director of Shakespeare's Globe – who therefore knows a thing or two about historically accurate stagings – has established Classic Spring, a new company dedicated to celebrating work by “proscenium playwrights” and staging their plays in the theatres they were written for.

“He has something of Dillane about him.” Thus Patrick Marber on David Oakes. “I rate him very highly indeed. One of the very best of his generation.” Audiences at the Theatre Royal Haymarket will be able to judge for themselves this autumn. Oakes, 34, stars opposite Natalie Dormer in Marber’s production of Venus in Fur, a sizzling two-hander by David Ives.

What a difference an ocean and a change of scale can make. When I saw the Mel Brooks musical Young Frankenstein on Broadway a decade ago, the show seemed to take its cue from the lumbering monster contained within it, who stutters and sputters before eventually being kickstarted into something resembling life.

Playwright Simon Stephens and director Marianne Elliott are hyped as a winning partnership. Their previous collaborations include The Curious Incident of the Dog in the Night-Time, a massive Olivier award-winning hit, and her sensitive revival of his early play, Port, at the National Theatre.

All theatre workers have a day that they dread. For actors there is a particular terror about a first preview that can fuel those performances with adrenaline. For playwrights - well, for me at least - it is the first time a play is ever read out loud by a company of actors. This never fails to shred me. I had been working as a playwright for five years, though, before I realised how much directors hate the first day of rehearsal.

"Maggie the cat is alive: I am alive," or so remarks the feline, eternally frustrated heroine of Tennessee Williams's Cat on a Hot Tin Roof. That self-assessment has rarely been truer than as spoken by Sienna Miller in the terrific West End production directed by Benedict Andrews, in which the actress finally lands the stage role in which she can let rip.

An enormous amount rides on a musical's opening number. Without explicitly expressing it, a good opener sets tone, mood and style. Take The Lion King, where "Circle of Life" so thrillingly unites music, design and direction that nothing that follows equals it. "Spring", the opener of The Wind in the Willows, repeatedly announces the warmth of the season, and precious little else. Animals dance perkily, but with nothing to dance about, the flatly staged song goes nowhere.