I can see the logic behind it... we have Yellow/Green for Earth, Brown for Live and Blue for Neutral in single phase cables (I'm real glad that LCD didn't have a Brown and a Blue wire!). In panel-building, Blue DIN terminals were always used for Neutral. So this kinda brings single and three-phase somewhat in-line. And it eradicates Yellow being mixed with Yellow/Green (I have actually seen a supposed qualified electrician doing this in a factory!).
However I do really wish the powers that be stop tinkering. Ultimately, trust nothing and nobody but yourself.
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