65 minute slot duration - C4 @ 10pm & ITV with IACGMOOH

I'd be happy if the stupid EPG entry has to be longer than 30 minutes in order for the programme to have an internal ad break" law applying to kids content would be dropped, as that obviously can be bent anytime by using (annoying and messy) 31 mins long slots, after Brexit
At least the "your programme has to be longer than 35 mins" initial proposal has not been successful, this way making linear "31 mins+ 29 mins" slots would be impossible, without fillers and very long ad breaks,, on kids channels. Not surprised by these laws, in general Belgium and many European EU countries hate "linear" schedules made up of "regular" slots, at least when available

But, if Brexit also means (among many things) that the 12 minutes per hour ad limit cap is at risk, then it's just not worth it.
But I don't think they would go beyond 12 minutes even after Brexit, since laws (particularly for UK public channels) are stricter in the UK, when it comes to minutage. And that's obviously a British decision.

12 minutes is plenty and has been the case for a good few years now, apparently in 2011 (it says here) films could only have an average of seven minutes per hour before it was harmonised with everything else. There is scope in the EU legislation for local practice and custom and some areas have less than 12mins on average.

But of course it could be far worse - see American TV. An average hour long scheduled programme does well to stretch to 40 minutes sometimes.

I don't think we'll see the max of 12 mins change anytime soon but the daily average of 7 mins and primetime average of 8 mins could rise to be in line with the 9 mins digital channels are allowed.

Which is an outdated principle now anyway as that dates from a time when it was to their advantage due to their smaller audience base. In the era of digital TV where everybody has access to at least 60 odd channels on Freeview alone, it should be balanced back out.

Obviously in the interim we will follow EU law as per the Great Repeal Bill but we can get things like this changed.

A leap into the great unknown and I hope you aren't seriously suggesting that one of the top priorities in the new world will be to 'change the rules to stop 31 minute programmes appearing on an EPG near you'?