Is The Ministry of Ungentlemanly Warfare based on a true story? The audacious real history of...

I have embraced a fascination with history for many decades. My own writings are historical fiction (with a heavy emphasis on the "historical"). Sadly, much of history (our story) is the story of human conflict. Equally sadly, that is also the focus of my fascination and my books reflect that focus. Please let me know if you see this film in a theater and how well you liked it. I'll wait for it to be streamed. I haven't been to a theater in years and don't intend on renewing that habit any time soon.