Clearing of tree roots from pipes and drains (plumbing services); Maintenance of plumbing; Plumbing; Plumbing and glazing services; Renovation of plumbing; Electrical apparatus installation; Electrical apparatus repair; Electrical engineering services (construction); Electrical installation services; Electrical wiring services; Installation of audio electrical apparatus; Interference suppression in electrical apparatus; Maintenance and repair of electrical apparatus; Maintenance, installation and repair of electrical items and equipment; Repair of electrical appliances; Residential, commercial and industrial installation and repair of electrical and computer wiring and cabling