However, since The Building Regulation 12 (it is not Part P) included electrical work in 2005 to regulate ancillary trades and DIYers
I'm not sure that was the sole, or even the main, intent. I would have thought that the intention was to introduce 'regulation' for all electrical work (which is predominantly undertaken by electricians), in the same way as all other types of Building work are 'regulated'
I have always understood the the BC could prevent people they deemed unsuitable from doing notifiable electrical work.
What led you to that 'understanding' ?
What, other than that, was the legislation intended to do? Surely some form of 'permission' must be given.
A Building Notice is a statement of one's intent to undertake certain work. I'm not aware of any mechanism for them to 'not accept' such a Notice, nor have I seen any mention of any 'permission' being required. The legislation certainly says nothing about that, and even most of the 'guidance' documents say that once one has given that Notice, indicating when one intends to start the work, that one can 'go ahead'.
As for "what is the legislation intended to do", you tell me! If (on the basis of the inspection that they are meant gto do) an LABC is not happy with the work, they would presumably refuse to issue a Completion Certificate, but what else may then (in practice) happen I don't know. I suppose that they could (as they can in relation to anything regulated by the Building Regs) take 'enforcement action', but I have to say that I've never heard of that happening in relation to electrical work - have you?
In this document: ..... is the following:
"The regulations do not stop you doing your own work or using an unregistered tradesperson, but you will need to make a Building Regulations Application for approval."
I don't know where the words "for approval" came from, since, as above, I see nothing about that in the legislation. As I think I may have posted recently. the Planning Portal says this:
Once you have given your 'building notice' and informed your local authority that you are about to start work, the work will be inspected as it progresses. You will be advised by the authority if the work does not comply with the building regulations.
This seems to imply that they do not have to 'approve' but that they can (and would) indicate if the work one is proposing to do would not be compliant with the Building Regs - the implication then being that if the work was undertaken as described, they would not issue a Completion Cert - but, as above, 'what then?'.
In practice, the description of the work in a Building notice is surely likely to be so 'vague' (e.g. "Replace CU with XYZ" or "Install a new radial sockets circuit") that they would very rarely be able to determine from the description that the work, if done, would not be compliant, isn't it?
Ironically, the thing which would (should) concern them most, namely that the applicant was not competent to do the work satisfactorily/safely, is not really something which they could determine from a Building Notice. I can't remember whether Building Notice application forms ask about 'qualifications' ( think not) but, even if they do, the absence of any 'relevant qualifications' (which will be the case with most DIYers, and probably some 'other tradespersons') does not in any way necessarily indicative 'incompetence'.
So - what happens if that approval is refused?
As above, I'm not at all sure that it can be 'refused', in which case 'refusing to issue a Completion Cert' might well be the most they could do- but, again as above, "what then?".
Furthermore, as I've said, I doubt that there is usually enough information in a Building Notice to tell them that they should 'refuse an application' ('not approve' the application), even if such an option existed for them, so it's hard to see under what circumstance they could legitimately 'refuse' (to 'approve' an application)., even that that option is available to them.
Kind Regards, John