The 'should' parts were being interpreted by different local authorities in different ways. The majority were treating recommendations as if they were law, due to the possible implications if lack of adherence caused an issue down the line.

It's the same as PAT, it's guidance, not law, but try telling that to a judge if you electrocuted someone and failed to take even basic 'recommended' steps to mitigate the risks.

I suspect the tier system and the rules are likely to be rewritten before they're issued again so we're guessing really about what's going to be in them. I'd also expect enforcement of recommendations to vary depending on local risk, so areas with lower case numbers are likely to see less enforcement action.

So, who knows really. I think it's too soon to start making any kind of plans or making statements about what is or isn't going to be allowed. The uncertainty and lack of guidance may be what hurts us most.