I read in that thread that BBC1 could broadcast 5Live audio if they needed to. Didn't they do that once with the picture being the breakdown slide? Seem to remember it happening when there was a big match in Austria and lightning knocked out the signal so they eventually continued in audio only (from 5Live) until the feed came back.
It was Euro 2008, a severe thunderstorm caused a power cut which knocked out the IBC, taking down the world feed. IIRC all broadcasters around the world lost coverage, with the exception of local broadcaster SRF who had their own feed.
BBC One quickly put up the breakdown slide with 5 live audio, with the occasional apology from the announcer explaining what had happened. As the IBC started to come back online I believe they gained access to a clean feed without graphics or commentary, so stuck with 5 live audio, until the proper world feed was restored.
If I’m remembering correctly the power outage during the thunderstorm happened because of a fault with the standby generator at the IBC in Vienna, despite the fact it had been tested not long before.
Have to say it wasn’t the quickest response from BBC One pres that night. When the pictures first went the frozen / scrolling picture was left on screen for about 90 seconds before the apology caption went up. After another delay I seem to remember the 5 Live audio was faded up, then dipped for an apology announcement just as they were welcoming BBC 1 viewers and explaining the situation. That happened because someone watching at home (me) phoned the 5 Live studio- they’d noticed pictures had been lost but weren’t aware they were going out in their place. As you say there was eventually a combination of clean pictures and 5 Live audio. Fortunately that was in an ISDN direct to TVC and wasn’t passing through the IBC. For the last two World Cups and other major events (like the Olympics) the radio audio has been on circuits via the IBC.
I’ve a feeling the pictures may have gone again for another period a short while after they came back. They were quicker on the apology caption the second time I think.
Apparently there was an EBU reserve that didn’t pass through the IBC and which was being downlinked by (the outsourced) sat ops at TVC being passed on to ITV for their highlights. It hasn’t been booked through to BBC One playout though, the BBC reserve was also via the IBC. At the time ITV were regularly producing sports coverage for Al Jazeera, so if correct that’s how’s they kept pictures. They also apparently had an ISDN carrying a reserve feed of their commentary (not via the IBC), so got that back very quickly as well. I’ve a feeling that EBU reserve feed was what first appeared on BBC One, before the IBC was fully back up and running.
Inspector Sands, Lewismpsmith and Larry the Loafer gave kudos