The Man With the Flower in His Mouth was, as far as I'm aware, the first television drama produced by BBC in 1930. No recordings of this are known to exist. However, it was re-made in 1967 and that version is available on YouTube. I ran across a couple of photos of the original actors doing the show in 1930 on another youtube video, and thought I'd share, as it's quite interesting to see the size of the checkerboard scene-changing mechanism, and what the original actors actually looked like.
Visit the following YouTube video and skip ahead to the 25:45 mark, give or take a few seconds
youtu.be/lCh3pbIcAYA