This excellent amateur production of Michael Frayn's Copenhagen could have been so much better had the actors managed to remember their lines.

The set design, music and lighting were all superb and Michael Wells, Edward Wickham and Felicity Clements gave convincing performances as scientists caught up in and divided by the politics of the Second World War.

The play focused on a trip made by German physicist Werner Heisenberg (pictured) to occupied Denmark in 1941 to see his former mentor Niels Bohr.

Although the visit is known to have taken place, the content of their discussions remains a mystery.

Was Heisenberg seeking help to develop nuclear weapons for the Nazis? And what might have happened if that help had been forthcoming?

It was a fascinating exploration of what-ifs underpinned by serious discourse on morality and the science of the atomic bomb.

But what a shame the drama was so often interrupted by the prompt helping Wickham or Clements with their next lines.

The actors might claim these noises-off were a post-modern nod to Frayn's farces or a dramatic play on the uncertainty principle. But they would be better off learning their lines.