Since gas ovens are still commonplace around the world and not a major suicide device, maybe were just looking at simple correlation specific to a time and place. Just like school shootings in the US are a terrible trend, suicide by oven may have been a terrible trend in England. I don’t disagree that the net effect of removing the popular tool can be significant, I definitely question if a similar result can be relied upon. Removing the gas may have just been a wake up or societal redirect that happily resulted in fewer suicides.
Hoopla is also great for books, especially audiobooks. Also legit, free and through your public library system (USA only)