Subject to the provisions of this Schedule, the activities of the construction industry are the following activities in so far as they are carried out in Great Britain:—
(a) all operations in—
(i) the construction, alteration, repair or demolition of a building;
(ii) the construction or demolition of a railway-line, siding or monorail;
(iii) the construction, structural alteration, repair or demolition of any aerodrome, airport, bridge, road, viaduct, dock, harbour, pier, quay, wharf, coast protection, river or drainage work, aqueduct, canal, inland navigation, reservoir, waterworks, bore-hole, well (other than an oil-well), filter bed, sewage works, sewer, cooling tower or pond, tunnel, heading, adit, chimney, furnace, carbonising or gas-making plant, nuclear or thermal power station, hydro-electric station. electric line or any structure designed for its support, cable trench or duct, oil refinery, pipe-line or defence installation;
(iv) the preparation of the site or the laying down of a foundation or sub-structure in connection with any of the above-mentioned operations or with the erection of structural metalwork;
(v) the construction of a swimming pool or other bathing place, or of a playing field or ground for sporting or recreational purposes, or the laying out of a cemetery;
(vi) the provision or continued provision for any building or other construction or work above-mentioned of water, gas, electricity, lighting, heating or ventilation, being operations undertaken in, upon, above or under the building or the close, curtilage or precincts thereof, or such construction or work, or any site above-mentioned;
(vii) the erection or dismantling of fencing, hoarding or scaffolding;
(b) the preparation of stone for building purposes;
(c) all operations in the manufacture of—
(i) a pre-fabricated building or section of a building, not being constructed wholly or mainly from metal, or plastics material, or from a combination of metal and plastics material;
(ii) doors, window frames, built-in storage units, stairs or curtain walling being in each case constructed wholly or mainly from wood; or
(iii) bank, church, laboratory or other joinery;
(d) the construction of shop, office or similar fittings on the premises on which they are to be installed;
(e) the erection or dismantling of exhibition stands;
(f) the hiring out of contractors' plant or scaffolding;
(g) when carried out in conjunction with any of the foregoing activities, any of the following activities, that is to say—
(i) research, development, design or drawing;
(ii) operations in connection with sale, packing, warehousing, distribution or transport;
(iii) work done at any office or laboratory, at any store, warehouse or similar place or at a garage;
(h) any other activity of industry or commerce carried out at or from an establishment engaged mainly in one or more of the foregoing activities.