Haven't read it yet:
"News Release 2004/0148:
29 June 2004 NEW RULES FOR BETTER AND SAFER BUILDINGS INCLUDING FIRST TIME REGULATION OF ELECTRICAL WORK IN THE HOMEPlans to enhance electrical safety that will make homes safer for householders and DIY enthusiasts were among a range of new building controls announced today (June 29) by the Office of the Deputy Prime Minister.
Each year on average 10 people die and about 750 are seriously injured in accidents involving unsafe electrical installations in the home. Today's plans aim to reduce this risk by bringing electrical safety in the home within the scope of the building regulations for the first time.
Minor jobs like replacing sockets and light switches will not be affected, but anyone thinking of, for example, adding new circuits to their house will have to get building control involved. The alternative is to get the work carried out by a suitably qualified expert."