It’s with happiness tinged with sadness that I reflect that this was our last Chichester weekend of the year. It’s a privilege to be able to visit this influential and creative theatrical hub a few times throughout the summer, mixing it in with sensational lunches at the Minerva Brasserie and an enjoyable wind-down post-show with the excellent sharing boards in the Minerva Grill; unless, like me, you don’t share your board – I have the Vegetarian Board all to myself and it’s fab!

For our final visit to Chichester this year we were spoilt for company, as we had Lord Liverpool, the Countess of Cockfosters and Professor and Mrs Plum to enjoy it with us. And for our first theatrical extravaganza of the day, we saw a revival of Michael Frayn’s Copenhagen, his highly successful play about an imagined get-together by quantum physicists Werner Heisenberg and Niels Bohr, together with Niels’ wife Margrethe, after they’d all died. They looked back at a meeting between them all in 1941 in Copenhagen.

What was the purpose of their meeting? Ay, there’s the rub. The essential elements of what brought them together are played out a number of times as the characters try to get to the truth of exactly what happened and why. I’m no quantum physicist, as you’ll soon see, but apparently – according to Michael Frayn’s introductory note in the programme – the act of observation changes what’s being observed. That’s one of the implications of quantum mechanics that Bohr and Heisenberg formulated in the 1920s. Therefore, every time we go back to re-observe, Groundhog Day-like, the events of that meeting, those events, by their very nature, have changed. Have I lost you? I’ve certainly lost myself.

It’s not often that a play totally bamboozles me, but I confess this one did. Mr Frayn was in the bar later that evening; we really should have asked him to tell us what it was all about, but then we would have looked completely foolish. I take comfort in the fact that more intelligent souls than me, not to mention highly experienced drama and literary critics over the years, have emerged from theatres showing this play saying, in a highly intellectual way of course, “my brain hurts”.

There’s no doubt that this meeting actually happened. In 1941, Bohr’s Denmark had been invaded and subjugated by Heisenberg’s Germany, so it wasn’t the most auspicious of times to meet, even though the two had been old friends from way back. It makes small-talk difficult; when Heisenberg tactlessly suggests a skiing trip to his place in the German mountains, the Bohrs look at him like he’s completely lost his marbles. Most commentators agree that their meeting was to debate the morality of scientists working on the creation of nuclear weapons. Heisenberg was in charge of the Nazi nuclear weapons project; Bohr was a natural peacemaker who despised the thought of science being used in this destructive way. But what actually went on between the two of them, we’ll probably never know. A number of letters were written, and discovered, over the years that complicate the opinions of these protagonists. Frayn’s play is therefore an attempt to clarify, or at least suggest, how the whole meeting might have played out. I think. But I’m not sure.

I was left merely to enjoy the interplay between the characters, the high-quality acting, and convincing arguments being made on stage that you think you understand and follow – only to discover you’ve been left behind on a new strand of arguments and you’ve already forgotten what the first one was about. I think it probably does help if you’re a quantum physicist yourself; none of us is, although between us we do have a number of first-rate intellects who can form an opinion on most things. Mrs Chrisparkle and I felt like we should be wearing dunce caps in the corner.

Maybe one of the problems with this very wordy play is the lack of action. Three actors, three chairs and a lot of sentences doesn’t necessarily make for great drama. Fortunately, Michael Blakemore (still directing at the age of 90, goodness me!) assembled a terrific, committed and intelligent cast who convert Frayn’s text into believable conversation and reminiscence. I particularly enjoyed the performance of Paul Jesson as Bohr; a reasoning and reasonable man but quick to ire and susceptible to bluster, as older authoritative figures frequently are. He delights in pointing out where his Young Pretender’s calculations and assumptions have gone wrong – he is the Master Lecturer, after all. Charles Edwards’ Heisenberg is more measured in tone, calmer in argument, with a little of the smugness you get from being on the winning side of a war (at least at that point). Umpiring the two is Patricia Hodge’s Margrethe, a solemn, contemplative character who chips in with a few pointed remarks but largely keeps her thoughts to herself unless she can see the two men completely going up the wrong path.

The play has long been a success, and it has certainly succeeded in making me curious to know more about these men and their theories. Alas, its short season has now ended, but this powerful, if static, production certainly exercised our brainboxes!

Production photos by Conrad Blakemore