I'm interested to know which years you consider the BBC and PBS to have been "non-political" or not engaged in propaganda (propaganda in the dictionary sense, n

I'm interested to know which years you consider the BBC and PBS to have been "non-political" or not engaged in propaganda (propaganda in the dictionary sense, not the pejorative sense)? I've watched both for 30 years and also significant amounts of archival footage from both as a hobby/interest in broadcast history, and it's very clear that they have always had politically motivated narratives.