New regulation is in full effect as of 1st January 2016
BS 7671 (The IET Wiring Regulations) sets the standards for electrical installation in the UK and many other countries. The IET co-publishes the Regulations with the British Standards Institution (BSI) and is the authority on electrical installation.
On 1st January 2015, the Third amendment to BS 7671:2008, The IET Wiring Regulations, became effective. Following this, contractors had a six month transition period to get up to speed with the changes and can design, install and certify to either the new or previous standard.
As of January 1st 2016, Regulation 421.1.201 (PROTECTION AGAINST FIRE CAUSED BY ELECTRICAL EQUIPMENT) comes into full effect.
All electricians must follow these standards and regulations, for more information, visit: http://www.niceic.com/contractor/essentials/3rd-amendment