I wouldn't be completely against a tweak so it's still 4 breaks an hour but they can show them all within shows, so half-hour programmes could have two breaks, but then flow straight into the next programme. That might encourage a return of 30-minute shows to the commercial networks rather than everything being dragged out to an hour.
That said it is notable the one thing that hasn't changed pretty much since the launch of UK television is the number of breaks within half hour shows, despite changes to shows of longer lengths. I think they got away with adding an extra break to hour-long shows around 2001 but the later changes to shows longer than 70 minutes and the scrapping of the "20-minute rule" was a step too far and is particularly notable on things shows The X Factor and anything 90 minutes or longer really.
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