[Keith]

It's worrying that a very small BBC studio at Millbank (it really is tiny) has not been subject to this moiré effect while using 3-wall LCD screens from 4 years ago, yet the new installations are experiencing issues.

Which means the camera distance excuse doesn't make sense. Did they just get the most recent LCD ones from eBay at a discount?

We're assuming that the cameras and other equipment was upgraded in the regions at the same time the new sets were installed. Is it possible that some regions are using much older cameras and/or gallery equipment, which can't cope as well with these screens.