substitute
2 | class B | (a) building work (other than specialist building work) in relation to a building that is 3 storeys or lower; and (b) basic building work |
3 | class C | (a) building work (other than specialist building work) in relation to a building that is 2 storeys or lower and is a class 1, class 2 or class 10a building; and (b) building work (other than specialist building work) in relation to a building that is a class 10b structure (other than a swimming pool or swimming pool fence) and is ancillary to a building mentioned in paragraph (a); and (c) basic building work |