I read the play years ago - it made a great impression on me at the time, but that has faded. Thanks for bringing my attention to the fact it's at YT; will give me an opportunity to see it brought off the page.
I read some reviews that called it Shaw's Chekhov play. I suppose the setup is Chekhovian - I had the impression it was very much of its time and the shadow of the First World War hung over it all.