At the beginning of the movie David Frost is in Sydney, and he's watching Nixon on the news, on a color TV. In 1974, TV in Australia was black and white...
shareIt's a mistake, it's listed in the 'goofs' section.
It must be so difficult getting all these little details right when you're making a film set decades earlier.
There was no colour TV being publicly broadcast in 1977, but TV networks were doing test broadcasts (unavailable to the public) as early as 1971. (I personally saw one in 1972 in a factory where televisions were being made.)
Also, the scene in the studio shows the speech on a studio monitor, not a public screen. Studio monitors would have likely been colour ones.
News reports from the US, UK and Europe would have been received in Australia in colour and rebroadcast in B&W.