Along with many others, my first exposure to Stephen Sondheim’s art was through watching the film of Bernstein’s West Side Story as a child. The song which still floors me is the Quintet near the end of Act 1. Bernstein’s ecstatic, dynamic music is  splendid in itself, but the number’s perfection is sealed by Sondheim’s lyrics, each character distinctly voiced, the rhythms and rhymes flawless. “Sperm to worm,” still makes me grin. That ability to articulate different voices, to overlay disparate musical styles is a trademark.

Two numbers, one hair-raising slice of music-theatre. When Sondheim's paying homage to the older, revue type of musical, you can extract a string of top hits: Follies, from which Marianka Swain chose "I'm Still Here" yesterday, could yield at least half a dozen more choices, Company almost as many. When his aim is a more through-composed kind of story-telling, with leading motifs recurring and transformed, "highlights" are less easily detached.

Surely there’s never been a more apt time for Sondheim’s great cry of defiance? “I’m Still Here” is sung by showgirl-turned-actress Carlotta in Follies (1971) – added during the Boston try-out in place of “Can That Boy Foxtrot”. Loosely inspired by Joan Crawford, it’s the ultimate anthem of showbiz survival.

Here's an irony worthy of the work of Stephen Sondheim, an artist who clearly knows a thing or two about the multiple manifestations of that word. On the same day that he turns 90, namely today, Broadway is unable to host the keenly awaited American premiere, scheduled for this evening, of the gender-flipped Company that stunned London last year.

You are at a party having a good time when someone gives you a glass of champagne. You take one and then another and soon the party is over. You get in the car to go home and are driving along when you see a police car in the rearview mirror: how annoying! Now you are regretting that indulgent second glass but what’s done is done. The cop gives you a breathalyzer test and you are exactly at the legal limit. The cop says you have to be below that limit, and you are arrested, charged, imprisoned and deported.

How is it that, in the nearly 900 pages of Sondheim's collected lyrics with extensive comments Finishing the Hat and Look, I Made a Hat, with numerous special boxes celebrating other composers and lyricists, he managed to mention Jerry Herman only once, and in passing?

Light Falls is the sixth play that I have written for the Royal Exchange theatre in Manchester and the fourth that its outgoing Artistic Director, Sarah Frankcom, will direct.

It all started in 2009 in the National Portrait Gallery. I’d had a meeting nearby so popped in to get a cuppa and stare at the beautiful rooftop view of London from their top-floor café, but a picture caught my eye. It was part of an exhibition of Victorian Women Explorers, a photograph of a woman with a rather severe face. The label said something like: "Gertrude Bell – Mountaineer, Explorer, Diplomat and Spy.

I’m currently opening Amsterdam, my first production for Actors Touring Company since being appointed Artistic Director last year, at the Orange Tree theatre in Richmond and then in Plymouth early in 2020. And what better time to premiere a play for the Europe of the present, triggered by the Europe of the past.

Two years ago Ermanna Montanari and Marco Martinelli, the visionary partners who have powered Ravenna's revolutionary Teatro delle Albe since 1986, led local people and international visitors down through the circles of Dante's Inferno. In 2021, the 700th anniversary of the greatest Italian poet's birth, they will take us into the presence of God.