I think, 50 years on, this code of practice should still apply - but it doesn't, as "news" has evolved into a kind of mish-mash of soundbites, infotainment and opinion. Sometimes the presentation is more important than the content of "news" programmes. Thankfully, occasionally, actual news leaks out, especially when there is a big, breaking story. But, mostly, "news"is drowned in blether, blah and glossy production.
I skim headlines these days. I used to be an avid watcher, listener and reader of news. But......well I could go on.
If only Sir Robin Day's code was guiding news interviewing today.....but, sadly, pigs might fly.