Installation, maintenance and repair of security apparatus and systems; installation, maintenance and repair of security alarms; installation, maintenance and repair of vehicle security devices; installation, maintenance and repair of fire detection systems; installation, maintenance and repair of fire alarms; installation, maintenance and repair of fire protection sprinkler systems; installation, maintenance and repair of electrical items and equipment; installation, maintenance and repair of lighting systems; installation, maintenance and repair of fittings for buildings; installation and repair of locks; installation of security doors and windows; installation of door and window fittings; installation of glass; installation of window films; installation of window coatings; double glazing installation; providing information, including by electronic means and via a global computer network, about all of the aforesaid services