– Building contractors
– Concrete works contractors
– Electrical installation contractors
– Fitting out and furnishing contractors. Interior decoration/design
– Gas, water, plumbing, heating, ventilation and air conditioning (HVAC) plant installation and maintenance contractors
– Painting and facade coating contractors
– Roofing and wall cladding contractors

– Civil and marine engineering contractors

– Demolition and blasting contractors

– Earth-moving, excavation, foundation and tunnelling contractors

– Transport infrastructure engineering contractors

– Heating, ventilation, air conditioning (HVAC) and refrigeration equipment

– Installation and maintenance services, for heating, ventilation, air conditioning (HVAC) and refrigeration equipment

Education, Training & Organizations

– Education and training

– Training courses for learners with special educational needs

– International organisations, administrations and associations

– Public administration

– Trade associations

– Trade unions, professional

– Medical care, social services

– Sheltered industries for the disabled

Energy, Environment

– Energy, fuel and water

– Water supply services

IT, Internet, R&D

– Information technology (IT) and Internet

– Software, systems

– Software, utilities

– Technical offices and engineering consultancies, architects

– Architects

Leisure & Tourism

– Hospitality, tourism, hotel and catering industries

– Restaurants and bars

– Travel agents, tour operators

– Leisure, culture and entertainment

– Film productions

– Libraries

– Postal services, telecommunications, radio and television

– Radio and television operators

– Sports and leisure equipment

– Fishing and hunting equipment

Metals, Machinery & Engineering

– Industrial subcontractors

– Maintenance and repair services for industrial equipment

Paper, Printing, Publishing

– Printing and publishing

– Publishing: Newspapers and magazines

– Printing equipment. Office and shop equipment

– Publicity panels

– Signs

Retail & Trader

– General traders, department and retail stores

– Retail trade

– Wholesale trade

Transport & Logistics

– Means of transport

– Tools sets, car repair and maintenance, garage

– Transportation and logistics services

– Road haulage, bulk
– Road haulage, part loads
– Road transport services classified by type of freight
– Warehouses and storage sites