You say 'breaking news' but of course news was a lot less immediate and there wasn't really such a thing then. It does seem odd now but I suppose it was a different age, if you ever see any clips of ITV's regional news of the same era, it too was a lot less newsy than we're used to these days.
Thanks - yes, I see your point about how news reporting has changed, but, like you say, it does seem odd that such a vast and highly-populated region missed out on regional bulletins for so long. No local sports news on a Saturday evening, for example, or no information about travel disruption or strikes in the capital. I probably have my 2011 'disgusted from Tower Hamlets' head on, but I'm surprised SE viewers didn't make more of a fuss about this.
I suspect, London+SE viewers saw the BBC as a national service, they didn't expect to see regional news on there,
outside of London, Southern TV did a fine job at covering the SE, ATV covered Oxford's patch. Having the 'regional' slot of Nationwide being presented by the same team as the national segment, only served to plant the idea in the minds of L&SE viewers that the show was 100% 'national'.
Remember also LWT carried no regional news at all until 1982, and Thames up until 1982 had 'Today' at 18:00hrs, which wasn't really regional news, more 'feature' based stuff. It was more akin to 'The One Show' really.
In 1982 the IBA forced Thames and LWT to collaborate on a 7 day regional news service for London.
I don't know what happened on ITV London prior to 1968, did Rediffusion and ATV carry anything resembling regional news ?