Whilst we're on the subject, could somebody explain to me how it's done - I expect I once knew, but I've forgotten. Or something.
I'm fairly certain it's a projection - if so, how far away is the actual newsroom, and why not switch the image occasionally? Also, how far would the screen be from the perspex? And how long is the time delay on the projection?
Or am I completely wrong and it's merely a window?
The newsroom isn't actually that far away from the News 24 set is it? I remember watching the channel a few years ago, and for some reason the female presenter was reading the news from the newsroom with the set in the background, where you could see the male presenter with guests preparing to go on air.
Everything you see is really there. If you're in the newsroom you can pretty much walk up to the plexi glass (though there's a little fenced off area to stop you getting too close - that's where they place the Christmas trees!). The gallery is just off to the left - you can see it on the left presenter shot sometimes. The only projection done on News 24 is the big screens; everything else is very much real.
It's actually quite off-putting standing behind the set. The glass is frosted from the camera side but, IIRC, it is transparent (or near-transparent) from the newsroom side. So, when you look through it your brain tells you that you can be clearly made out onscreen because you can see them but in reality you're blurred. It gave me a bit of a fright!