Not necessarily, but any such work has to be carried out by a competent person who is registered under the government-approved Part P self-certification scheme. The following types of work also need to be notified to the local authority:
consumer unit replacements;
electric floor or ceiling heating systems;
extra-low voltage lighting installations;
garden lighting and / or power installations;
installation of a socket outlet on an external wall;
aerials, Satellite Dishes Television and Radio Aerials
installation of outdoor lighting and / or power installations in a garden;
installation of new central heating control wiring;
solar photovoltaic power supply systems;
small-scale generators.