Back in the 20th century, people talked very little about transgender people, and if they did, they generally used the term "trans-sexual". It would be vain to look for much TV and Radio content showing support for transgender people in our period. Nevertheless, a BBC documentary in the 1970s (a student in one of my lectures was kind enough to point out) played a pioneering role, even if there are elements of it which we would find rather backward today.
Here is what Wikipedia has to say about the 1979 documentary "A Change of Sex"
You can find episode two on YouTube
And here is BBC news on the death of Julia a few years ago: