So, I have now managed to watch the BBC Horizon show looking back at the way the corporation has covered the climate change issue since its beginning.
The first thing to say is that it was clearly from the same propaganda-lite stable as Climate Change by Numbers, with official lines on the climate issue repeated dutifully and unquestioningly from beginning to end. The only point at which the litany was interrupted was a segment on the effect of clouds from Tomorrow's World which was interesting and scientific and - icing on the cake - was even rounded off with presenter Helen Czerski noting that the effect of clouds was still unsettled.
Despite this, the programme was quite interesting as a history of the BBC's decline with the more sober and scientific programmes of the 1980s giving way to sensationalism, dogmatism and environmentalism in more recent years. One could also do a interesting study of the way the corporation has used innuendo to further the green cause.
The worst bit was probably the rerunning of Paul Nurse's naked disinformation about Climategate, which really must rank among the most shameful pieces of the BBC's scientific output ever broadcast. But at the end of the day, and as I noted above, this was clearly part of the BBC's campaigning efforts ahead of the Paris climate summit. In that vein it's interesting to note not only the overlap between production teams for the two shows but also another remarkable similarity between the two shows, with both ending by telling the viewer in essence: "The science has spoken. Now it's up to us to decide what to do about it".
Back to their old ways I would say.