[bbctvtechop]

And if there is a breaking UK news story at 8pm on a Thursday or midday on a Sunday?

Well, currently on Thursdays at 8pm is Outside Source, which I believe is a simulcast. I can't remember the last time there was a UK opt-out for a major UK item around this time, since the evening simulcasts began.

Similarly I get the impression a lot of the weekend (daytime) content is now already a simulcast.

I suspect part of the reason for merging the existing News Channel and World News into a new 'BBC News' channel is so that in event of major breaking news they don't feel as obliged to consider non-UK viewers.

The correct answer is "if there is UK breaking news outside those hours, it won't be covered - or will be covered at the expense of World viewers".

This is why having a international and domestic news channel combined will never work. Better prey no Prime Minister scandal ever breaks at the same time as a massive earthquake in Asia. Or a massive UK weather event at the same time as a terrorist attack in the USA. After all, the DG said to the Parliamentary enquiry that people would be in the building ready to go on air. They wouldn't need to be called up or travel in from anywhere.