Retailing services provided in relation to plumbing supplies and plumbing products, building materials, tools and hardware; discount services rendered to scheme members in relation to the retail supply of plumbing supplies and plumbing products, hardware, tools and building materials; procurement services for others being the purchase of plumbing supplies and products, hardware, tools and building materials for others; group purchasing services; arranging for the purchase and provision of goods for external suppliers, such goods being plumbing products and supplies, hardware, tools and building materials; organisation, operation and supervision of sales and promotional incentive schemes