From the Building Regulations:
18 Testing of building work
The local authority may make such tests of any building work as may be necessary to establish whether it complies with regulation 7 or any of the applicable requirements contained in Schedule 1.
Regulation 7 says:
7 Materials and workmanship
Building work shall be carried out—
(a) with adequate and proper materials which—
(i) are appropriate for the circumstances in which they are used,
(ii) are adequately mixed or prepared, and
(iii) are applied, used or fixed so as adequately to perform the functions for which they are designed; and
(b) in a workmanlike manner.
Schedule 1 is where all the various requirements are listed, including P1 & P2.
So I guess strictly speaking the regulations do not require them to test, they just say they may.
However, the Building Regulations is not the only law that applies. There is also the Building Act 1984. I don't have a copy, so can't quote verbatim, but it gives LABCs the responsibility of ensuring that the regs are complied with.
Returning to the Building Regulations, P1 is as you say, but there is no definition of "reasonable provision", there is no mention of working to BS 7671 which would require testing, and, maybe tellingly, there is no electrical equivalent of Regulation 20A which explicitly requires people carrying out work to which paragraph E1 (Protection against sound from other parts of the building and adjoining buildings) applies to carry out tests themselves, and submit the results to LABC.
So the Building Act makes LABCs responsible for ensuring compliance, the Building Regulations say that they may carry out tests and do not say that the person doing the work must, and the ODPM say that LABCs must not insist that that the person doing the work provide test results.
It would seem pretty clear that if the LABC believe that tests are necessary to prove compliance they must carry them out, but it'll probably take a court case to make them behave.
18 Testing of building work
The local authority may make such tests of any building work as may be necessary to establish whether it complies with regulation 7 or any of the applicable requirements contained in Schedule 1.
Regulation 7 says:
7 Materials and workmanship
Building work shall be carried out—
(a) with adequate and proper materials which—
(i) are appropriate for the circumstances in which they are used,
(ii) are adequately mixed or prepared, and
(iii) are applied, used or fixed so as adequately to perform the functions for which they are designed; and
(b) in a workmanlike manner.
Schedule 1 is where all the various requirements are listed, including P1 & P2.
So I guess strictly speaking the regulations do not require them to test, they just say they may.
However, the Building Regulations is not the only law that applies. There is also the Building Act 1984. I don't have a copy, so can't quote verbatim, but it gives LABCs the responsibility of ensuring that the regs are complied with.
Returning to the Building Regulations, P1 is as you say, but there is no definition of "reasonable provision", there is no mention of working to BS 7671 which would require testing, and, maybe tellingly, there is no electrical equivalent of Regulation 20A which explicitly requires people carrying out work to which paragraph E1 (Protection against sound from other parts of the building and adjoining buildings) applies to carry out tests themselves, and submit the results to LABC.
So the Building Act makes LABCs responsible for ensuring compliance, the Building Regulations say that they may carry out tests and do not say that the person doing the work must, and the ODPM say that LABCs must not insist that that the person doing the work provide test results.
It would seem pretty clear that if the LABC believe that tests are necessary to prove compliance they must carry them out, but it'll probably take a court case to make them behave.