I heard this programme, "Tracking The Lincolnshire Poacher" when it was first broadcast in 2005.
https://www.youtube.com/watch?v=Wvr6o7fBcTY
I thought it was very well done, not only for the facts presented as far as anyone knew any facts, but also the way it portrayed the feeling of intercepting these messages for the first time, the mystery of them and that strangeness that the spectrum between about 2 and 5 MHz once had.
The programme seemed to capture what I felt when I first encountered these messages as an impressionable teenager, and at last, the BBC, effectively an arm of HMG, has publicly acknowledged their existence and we no longer have to be quite so careful about talking about them on amateur radio or in web forums.