If you look at 9:28 the music stops and the ratio changes, then at 9:55 the music carries on and the ratio changes back. Wondering if due to the power cut something didn't reboot properly?
Look carefully and you'll notice that it's not just a change in aspect ratio, the two breakdown slides are different.
I think what you're seeing is them switching between the two playout areas that were operational at the time - the NTA which provided BBC1 and 2 analogue, and the DTA which did the 4 digital channels. The outputs of each were able to supply the other platform in various ways and they did routinely as one was phased in and the other phased out.
Hence you see one breakdown slide in 16:9 coming from the DTA and a 14:9 slide coming from the NTA (it wouldn't have been originally 14:9, that would have been an ARC
on one of the circuits between the two areas).
They would have been switching between the two presumably because one had been affected more by the issue, or one was deemed more reliable
Last edited by Inspector Sands on 27 February 2019 11:59am - 3 times in total