Telecommunication wiring; construction services; building, construction and demolition; HVAC (heating, ventilation and air conditioning) installation, maintenance and repair; installation of security and safety equipment; installation of data network apparatus; installation of door fittings; installation of burglar alarms; fire alarm installation; installation of wireless telecommunications equipment and wireless local area networks; electric appliance installation and repair; installation of residential security apparatus; installation of radio telephone equipment; installation of lighting apparatus; installation of street furniture; installation of temporary barriers; installation of theft prevention devices; installation of plant; installation of door openers and closers; installation of doors and windows; installation of locks; installation lighting systems; installation of computerised information systems; installation of security systems; installation of solar powered systems; installation access control systems; installation of tents; installation of window frames; installation of glass in conservatories, windows, doors and greenhouses; burglar alarm installation and repair; venetian blind installation and repair; computer hardware and telecommunication apparatus installation, maintenance and repair; alarm, lock and safe installation, maintenance and repair; lift and elevator installation, maintenance and repair; maintenance of electronic apparatus; maintenance of communications equipment; window maintenance; plant maintenance; maintenance of fire alarm installations; maintenance, servicing and repair of power generating apparatus and installations; renovation, repair and maintenance of electrical wiring; repair of alarms; repair of electronic apparatus; repair of lighting apparatus; window repair; repair of curtains; repair and insulation of window joints; maintenance and repair of electricity generators; maintenance and repair of electronic installations; maintenance and repair of electronic apparatus; maintenance and repair of electronic display panels; maintenance and repair of gas and electricity installations; repair or maintenance of power generators; repair or maintenance of electric lighting apparatus; repair or maintenance of power distribution or control machines and apparatus; repair or maintenance of electronic machines and apparatus; curtain fitting services; electrical installation services; maintenance and repair services relating to door closers; maintenance and repair services relating to automatic door equipment; maintenance and repair services relating to automatic barriers; repair of security locks; sign posting services; services for the installation of alarms; glazing, installation, maintenance and repair of glass, windows and blinds; antenna installation and repair; maintenance and servicing of security alarms; repair or maintenance of mechanical parking systems; repair or maintenance of bicycle parking apparatus