Not the OP but I don’t recall the actual law saying 24/7 moderation was required.

Given the UK already has a “watershed” time where terrestrial TV can broadcast mature content between set hours (from 9pm), I cannot see why the same expectation shouldn’t exist that moderation isn’t happening outside of reasonable hours.

Typically with laws in the UK (and EU too) is to use more generalised language to allow the law a little more flexibility to apply correctly for more nuanced circumstances. Such as what is practical for a small forum to achieve when its specialty isn’t anything to do with adult content.

You’ll definitely find examples where such laws are abused from time to time. But they’re uncommon enough that they make national news and create an uproar. Thus the case goes nowhere due to the political embarrassment that department draws to itself.

Though to be clear, I’m not defending this particular law. It’s stupid and shouldn’t exist.