[robertclark125]

I believe there was a potential for 9.25 splats as GMTV finished as the distribution was reconfigured at the London end to take the extra facilities for macro regional ads out of circuit.

It wasn't the macro regions being taken out of circuit, it was the ITV companies presentation suites being taken out/put back into line. 

GMTV still passed through the regional centres as they did the news bulletins, but my understanding but via the news studios who essentially opted out. 

Presumably the circuits carrying GMTV to the regions was then replaced with the first network programme. The macro ad regions were irrelevant, each station would have just got one

In other words, all they were doing was switching the output from the regional companies news studios to the main suites. What would've happened at weekends, when GMTV didn't have regional news?

This leads to another question; had Oracle retained the teletext franchise beyond 1992, would this have meant their regional sections being available during GMTV? On the flipside, had TV-am remained on air after 1992, and Teletext UK had the teletext service, I guess the regional teletext sections wouldn't have been available during TV-am?