The big question is, if you find some thing which you feel is not safe, what do you do?
The example given was the oil spill, if you see an oil spill which could be dangerous you must do some thing, it could be giving your boss a report in writing, even if on back of smoke packet. Or you could clean it up your self.
Verbal is not good enough, text message is OK, of course if questioned you say sorry did not see the oil, then your OK, but if you say yes I saw it, so I told my boss verbally your up the creak.
So first question is it a danger? if it just does not comply that's not a problem, but if it's dangerous it is, so if you consider it dangerous you must either correct it, or report it in writing.
Writing on a forum will not really count, it would need reporting to your boss, the client, or DNO in other words some one who could correct it. Ringing up the contractor who did the work and saying have you seen what your lads have done will not really cut it.
So big question is it simply bad workmanship? or is it dangerous? The easy answer is just bad workmanship, that way your not obliged to report it in writing. If however you say it's dangerous, then you have admitted by using forum you were aware, so if anyone is injured you could end up in court.
I do think from the pictures just poor workmanship, seems to have an earth and that earth may be connected to the SWA at the other end, where we hope there is an overload.
I knew a firm erecting cranes were rough, I was asked to look at a fault, I said certainly, however if I find it does not comply I can't ignore what I find, I will lock it off, and I was told never mind, we will get some one else. Both he and I knew likely I would condemn it and lock it off.
Domestic however is a bigger problem, your not permitted to make a home uninhabitable without finding alternative accommodation for occupants, nothing about who must pay, but you can't simply say that's dangerous, lock it off and walk away.
So lock off supply to shower, where there is also a bath, not a problem, but in this case only way to isolate is to draw DNO fuse, which we are not normally authorised to do, but British law says doing some thing illegal it permitted if by doing it you are preventing a greater crime, like blocking road to stop bank robber, so if dangerous you could draw the DNO fuse with of course the correct PPE.
But this is rather a drastic measure, and I don't think required here, but then one is saying it's not dangerous, can't have it both ways, either not dangerous and you can walk away, or is dangerous you must draw fuse after getting suitable PPE in real terms you would phone DNO and stay there on guard until they arrived.
So which is it?