Is this junction box installation acceptable?

This junction box has been installed by my builder's electrical worker, the void above the box is the ceiling space on ground floor

is this acceptable for residential installation?

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  • Good spot!

    The lever seems to be broken in the triplet left of it, but cpc and N: where is the line?

    (Presumably, there was a CU up against the ceiling at one time.)

  • It gets better than that

    Installer tried to cert that there was a pre-existing open circuit on the PE ring

    This wasn't actually the connection causing the issue, these lever terminals suitable for 6 - 25 ², or the top connection might have just been clamped

    The correction isn't much better

    have to double check these connections too