[Si-Co]

Only just seen that original video.  While it's not the best I've heard, the tone was right for such a solemn intro.  It's not like the CA was delivering as if he was introducing Love Island on ITV2.

To be fair, the more I listen to it, the less I find wrong with it.  Rightly or wrongly, on a channel like BBC One, we aren’t used to hearing such solemn announcements being voiced by someone with a noticeable MLE accent, and that’s a lot of what draws attention to it. Sure, I could pick fault with the delivery - but if that announcement was made in exactly the same tone by someone with a more standard accent I doubt we would be having this discussion. 

I can’t say similar about the woman announcer though - her pauses and emphasis were in all the wrong places, and had she appeared in vision I can picture her with a huge smile on her face while making those announcements into the news and Panorama. A bit more than having a bad day, in my opinion.