It is 30 years since Shadowlands, William Nicholson's much-loved play about CS Lewis's unexpected love affair with Joy Gresham, an American poet, was first seen on stage.

I think it’s always a dangerous sport to try and consciously unravel where your ideas come from. Lest you break the spell and inadvertently silence yourself…

You could be forgiven for not remembering the “coughing major” brouhaha in 2001, coming as it did the day before 9/11, when we had rather more pressing matters to attend to than a contestant being accused of cheating on television quiz show. But playwright James Graham has mined an entertaining confection from the affair and its subsequent court case in 2003.

My inspiration for The House They Grew Up In, my new play at Chichester Festival Theatre came about five years ago, in the café of an art gallery near my house. This café had a slightly intimidating air, full of its own importance, as if the art in the adjacent rooms elevated it above the normal status of a café.

What do you call a woman who murdered Dirty Den, is the darling of TV comedy producers, writes radio plays about the golden age of Hollywood, hosted and judged Channel 4’s Jewish Mum of the Year, was until just a few weeks ago tap dancing through eight shows a week in Stepping Out in the West End and was runner-up on Celebrity Mastermind with her specialist subject:

 When Shakespeare visits the bearpit of the West End, it is usually in the company of a big name: Judi Dench, Sheridan Smith, Martin Freeman. This Christmas the bard enters the Theatre Royal, Haymarket without any such support. And there is a further hurdle to clear: Love’s Labour’s Lost is barely ever been seen outside the subsidised sector. It forms part of a pair which audiences might take a moment to get their head around: Much Ado About Nothing is presented as its Shakespearean twin called Love’s Labour’s Won.

Watching Cameron Mackintosh’s joyful revision of this Sixties musical, it’s possible to believe for a moment that all the world needs now is love sweet love and a shit-ton of banjos. With a new book by Downton Abbey behemoth Julian Fellowes, new numbers by the pair behind hit musical Mary Poppins, and design that delights at every turn of the multi-revolve, Half A Sixpence seems destined to follow a flush of previous Chichester Festival musicals into the West End. It also puts vintage stars around the previously unknown name of Charlie Stemp.

Thought Terence Rattigan was a playwright of the drawing room? Think again. A day after his defining work The Deep Blue Sea opened in an acclaimed revival at the National, Chichester Festival Theatre takes a lavish risk on this epic later work, which swaps dingy post-war London for the beating heat of the Arabian desert, and restrained middle-class passions for bloody revolution.

Nothing quite prepares you for your first sight of Thiepval, the Memorial to the Missing of the Somme. I had read about the events it commemorated and, before that, been told about them as a young boy. I’d studied the war poets at school and as a teenager had been introduced to Robert Graves’s Goodbye to All That and Erich Maria Remarque’s All Quiet on the Western Front. I knew about the vast numbers of war dead, of how they exceeded the populations of famous cities.

If Downton Abbey creator Julian Fellowes were (a lot) more like Ibsen, our national viewing habits would be in good hands. But then, as the hero of An Enemy of the People discovers, presuming to know what’s good for the public is a dangerous game. In his first full stage role in 12 years, the Earl of Grantham, AKA Hugh Bonneville, returns to his local Chichester Festival Theatre as a whistleblower who thinks he’s doing his town a favour.