The Medway Handyman wrote:

AFAIK repairs to an existing circuit are outside of part P and don't need
certification.

Part P makes the fixed electrical installation of a dwelling a
controlled service under the building regulations. Therefore any work
done to such an installation is within its scope, whether notifiable or
not. IOW Part P always applies.

All the Part P legislation now says is:

"P1 Reasonable provision shall be made in the design, installation,
inspection and testing of electrical installations in order to protect
persons from fire or injury."

However (1) note that there's no explicit reference to BS 7671 in the
legislation. Note also that the previous Part P2 requirement, which
required "information" (i.e. documentation) to be provided was removed
in the amendment of April this year. Thus there would seem to be no
explicit legal requirement to provide certification.

However (2) Para 1.8 of Approved Document 2 states that compliance with
Part P can be demonstrated by the issue of an appropriate electrical
installation certificate under BS 7671. Thus it would be difficult to
challenge the assumption that certification is required for new
installations, rewires and what BS 7671 calls "additions and alterations."

However (3) what we're talking about here possibly isn't an
"alteration," it's a "repair." Or does inserting a crimped joint in a
cable (not accessible for inspection) where previously there was none
constitute an alteration? - I don't know the answer to that. If it is
an alteration a minor works certificate (MWC) would be required, but if
only a repair BS 7671 doesn't require a certificate (although para 1.13
of the approved document describes it as advisable).

So, to come to Steve Dawson's defence (and he has been posting here for
a long time, BTW) I think he has a valid point. Not that Dave shouldn't
be doing the work, but that he should (if competent) be testing and
certifying it. OK, this is a borderline example, but there's no doubt
that many of the jobs listed on
http://www.medwayhandyman.co.uk/electrics.htm are definitely additions
or alterations which do require testing and MWCs.

--
Andy