[Taf]

Part P of the Building Regulations and BS7671 (the "Wiring Regulations").
Later revisions of part P (latest is 2013) retain the requirement to work to an appropriate standard, but have relaxed the requirements on both certification and notification for many more types of minor works, and crucially also permit a member of an approved body to inspect and 'sign off' notifiable aspects of any work of a third party such as DIYer whose work is of a suitable standard. This is intended to free up local authorities, who often do not have suitably qualified building control staff themselves. Due to uncertainty about who then becomes be responsible for any hidden wiring, very few electricians are happy to sign off an installation that they have not been party to from the outset, and been able to agree stages to inspect and test before any covering in.

http://en.wikipedia.org/wiki/Electri...United_Kingdom