In 2005 the Government introduced electrical safety rules into the Building Regulations for England and Wales. Because of this, most fixed electrical installation work in homes must, by law, meet the Building Regulations.
Part P states that anyone carrying out electrical installation work in a home must make sure that the work is designed and installed to protect people from fire and electric shocks.
Part P applies to any changes made to existing installations, including any parts that have been rewired. In April 2013 further changes were introduced, reducing the range of electrical installation work that is notifiable - removing some requirements in kitchens and outdoors.