construction, alteration, repair, extension, demolition or dismantling of buildings or structures (whether permanent or not), including offshore installations;

construction, alteration, repair, extension or demolition of any works forming, or to form, part of the land, including (in particular) walls, roadworks, power-lines, electronic communications apparatus, aircraft runways, docks and harbours, railways, inland waterways, pipe-lines, reservoirs, water-mains, wells, sewers, industrial plant and installations for purposes of land drainage, coast protection or defence;

installation in any building or structure of systems of heating, lighting, air-conditioning, ventilation, power supply, drainage, sanitation, water supply or fire protection;

internal cleaning of buildings and structures, so far as carried out in the course of their construction, alteration, repair, extension or restoration;

painting or decorating the internal or external surfaces of any building or structure;

services which form an integral part of, or are preparatory to, or are for rendering complete, the services described in paragraphs (a) to (e), including site clearance, earth-moving, excavation, tunnelling and boring, laying of foundations, erection of scaffolding, site restoration, landscaping and the provision of roadways and other access works.