Sch 11 para 2
The applicant must satisfy the Inland Revenue, by such evidence as may be prescribed in regulations made by the Board of Inland Revenue, that he is carrying on a business in the United Kingdom which— (a) consists of or includes the carrying out of construction operations or the furnishing or arranging for the furnishing of labour in carrying out construction operations, and (b) is, to a substantial extent, carried on by means of an account with a bank.