| 71210000 | Advisory architectural services | Architectural and related services | 
                                    
                                        
                                            | 45232200 | Ancillary works for electricity power lines | Ancillary works for pipelines and cables | 
                                    
                                        
                                            | 71200000 | Architectural and related services | Architectural, construction, engineering and inspection services | 
                                    
                                        
                                            | 71220000 | Architectural design services | Architectural and related services | 
                                    
                                        
                                            | 71000000 | Architectural, construction, engineering and inspection services | Construction and Real Estate | 
                                    
                                        
                                            | 45262700 | Building alteration work | Special trade construction works other than roof works | 
                                    
                                        
                                            | 45210000 | Building construction work | Works for complete or part construction and civil engineering work | 
                                    
                                        
                                            | 71315300 | Building surveying services | Building services | 
                                    
                                        
                                            | 71315400 | Building-inspection services | Building services | 
                                    
                                        
                                            | 45213315 | Bus-stop shelter construction work | Construction work for commercial buildings, warehouses and industrial buildings, buildings relating to transport | 
                                    
                                        
                                            | 45213312 | Car park building construction work | Construction work for commercial buildings, warehouses and industrial buildings, buildings relating to transport | 
                                    
                                        
                                            | 45000000 | Construction work | Construction and Real Estate | 
                                    
                                        
                                            | 45213320 | Construction work for buildings relating to railway transport | Construction work for commercial buildings, warehouses and industrial buildings, buildings relating to transport | 
                                    
                                        
                                            | 45230000 | Construction work for pipelines, communication and power lines, for highways, roads, airfields and railways; flatwork | Works for complete or part construction and civil engineering work | 
                                    
                                        
                                            | 45234000 | Construction work for railways and cable transport systems | Construction work for pipelines, communication and power lines, for highways, roads, airfields and railways; flatwork | 
                                    
                                        
                                            | 45233000 | Construction, foundation and surface works for highways, roads | Construction work for pipelines, communication and power lines, for highways, roads, airfields and railways; flatwork | 
                                    
                                        
                                            | 34990000 | Control, safety, signalling and light equipment | Miscellaneous transport equipment and spare parts | 
                                    
                                        
                                            | 45221213 | Covered or partially-covered railway excavations | Construction work for bridges and tunnels, shafts and subways | 
                                    
                                        
                                            | 35262000 | Crossing control signalling equipment | Police signs | 
                                    
                                        
                                            | 45221220 | Culverts | Construction work for bridges and tunnels, shafts and subways | 
                                    
                                        
                                            | 45111000 | Demolition, site preparation and clearance work | Building demolition and wrecking work and earthmoving work | 
                                    
                                        
                                            | 45232451 | Drainage and surface works | Ancillary works for pipelines and cables | 
                                    
                                        
                                            | 34632300 | Electrical installations for railways | Railways traffic-control equipment | 
                                    
                                        
                                            | 34632200 | Electrical signalling equipment for railways | Railways traffic-control equipment | 
                                    
                                        
                                            | 71320000 | Engineering design services | Engineering services | 
                                    
                                        
                                            | 71321000 | Engineering design services for mechanical and electrical installations for buildings | Engineering design services | 
                                    
                                        
                                            | 71322000 | Engineering design services for the construction of civil engineering works | Engineering design services | 
                                    
                                        
                                            | 71350000 | Engineering-related scientific and technical services | Engineering services | 
                                    
                                        
                                            | 71313000 | Environmental engineering consultancy services | Consultative engineering and construction services | 
                                    
                                        
                                            | 71313450 | Environmental monitoring for construction | Environmental engineering consultancy services | 
                                    
                                        
                                            | 90700000 | Environmental services | Sewage, refuse, cleaning and environmental services | 
                                    
                                        
                                            | 45112000 | Excavating and earthmoving work | Building demolition and wrecking work and earthmoving work | 
                                    
                                        
                                            | 45340000 | Fencing, railing and safety equipment installation work | Building installation work | 
                                    
                                        
                                            | 45221113 | Footbridge construction work | Construction work for bridges and tunnels, shafts and subways | 
                                    
                                        
                                            | 45233161 | Footpath construction work | Construction, foundation and surface works for highways, roads | 
                                    
                                        
                                            | 71325000 | Foundation-design services | Engineering design services | 
                                    
                                        
                                            | 71351000 | Geological, geophysical and other scientific prospecting services | Engineering-related scientific and technical services | 
                                    
                                        
                                            | 45111230 | Ground-stabilisation work | Demolition, site preparation and clearance work | 
                                    
                                        
                                            | 71311300 | Infrastructure works consultancy services | Civil engineering consultancy services | 
                                    
                                        
                                            | 45314300 | Installation of cable infrastructure | Installation of telecommunications equipment | 
                                    
                                        
                                            | 45314310 | Installation of cable laying | Installation of telecommunications equipment | 
                                    
                                        
                                            | 45316200 | Installation of signalling equipment | Installation work of illumination and signalling systems | 
                                    
                                        
                                            | 51511200 | Installation services of handling equipment | Installation services of lifting and handling equipment, except lifts and escalators | 
                                    
                                        
                                            | 51611120 | Installation services of railway real-time departures and arrival display screens or boards | Installation services of computers | 
                                    
                                        
                                            | 45316000 | Installation work of illumination and signalling systems | Electrical installation work | 
                                    
                                        
                                            | 45234140 | Level crossing construction works | Construction work for railways and cable transport systems | 
                                    
                                        
                                            | 90742100 | Noise control services | Services related to noise pollution | 
                                    
                                        
                                            | 90742400 | Noise pollution advisory services | Services related to noise pollution | 
                                    
                                        
                                            | 90742300 | Noise pollution monitoring services | Services related to noise pollution | 
                                    
                                        
                                            | 90742200 | Noise pollution protection services | Services related to noise pollution | 
                                    
                                        
                                            | 45223320 | Park-and-ride facility construction work | Structures construction work | 
                                    
                                        
                                            | 90922000 | Pest-control services | Facility related sanitation services | 
                                    
                                        
                                            | 45213322 | Rail terminal building construction work | Construction work for commercial buildings, warehouses and industrial buildings, buildings relating to transport | 
                                    
                                        
                                            | 45221112 | Railway bridge construction work | Construction work for bridges and tunnels, shafts and subways | 
                                    
                                        
                                            | 45234100 | Railway construction works | Construction work for railways and cable transport systems | 
                                    
                                        
                                            | 45234114 | Railway embankment construction work | Construction work for railways and cable transport systems | 
                                    
                                        
                                            | 71311230 | Railway engineering services | Civil engineering consultancy services | 
                                    
                                        
                                            | 34946120 | Railway materials | Railway-track construction materials and supplies | 
                                    
                                        
                                            | 45234115 | Railway signalling works | Construction work for railways and cable transport systems | 
                                    
                                        
                                            | 45213321 | Railway station construction work | Construction work for commercial buildings, warehouses and industrial buildings, buildings relating to transport | 
                                    
                                        
                                            | 72212140 | Railway traffic control software development services | Programming services of application software | 
                                    
                                        
                                            | 48140000 | Railway traffic control software package | Industry specific software package | 
                                    
                                        
                                            | 45221242 | Railway tunnel construction work | Construction work for bridges and tunnels, shafts and subways | 
                                    
                                        
                                            | 45221122 | Railway viaduct construction work | Construction work for bridges and tunnels, shafts and subways | 
                                    
                                        
                                            | 34632000 | Railways traffic-control equipment | Parts of railway or tramway locomotives or rolling stock; railways traffic-control equipment | 
                                    
                                        
                                            | 34946100 | Railway-track construction materials | Railway-track construction materials and supplies | 
                                    
                                        
                                            | 34946000 | Railway-track construction materials and supplies | Railway equipment | 
                                    
                                        
                                            | 71631470 | Railway-track inspection services | Technical inspection services | 
                                    
                                        
                                            | 50225000 | Railway-track maintenance services | Repair, maintenance and associated services related to railways and other equipment | 
                                    
                                        
                                            | 45262690 | Refurbishment of run-down buildings | Special trade construction works other than roof works | 
                                    
                                        
                                            | 50200000 | Repair, maintenance and associated services related to aircraft, railways, roads and marine equipment | Repair and maintenance services | 
                                    
                                        
                                            | 50220000 | Repair, maintenance and associated services related to railways and other equipment | Repair, maintenance and associated services related to aircraft, railways, roads and marine equipment | 
                                    
                                        
                                            | 34922100 | Road markings | Road-marking equipment | 
                                    
                                        
                                            | 34992200 | Road signs | Signs and illuminated signs | 
                                    
                                        
                                            | 45233221 | Road-surface painting work | Construction, foundation and surface works for highways, roads | 
                                    
                                        
                                            | 90742000 | Services related to noise pollution | Pollutants tracking and monitoring and rehabilitation services | 
                                    
                                        
                                            | 45100000 | Site preparation work | Construction work | 
                                    
                                        
                                            | 31620000 | Sound or visual signalling apparatus | Electrical equipment and apparatus | 
                                    
                                        
                                            | 45232220 | Substation construction work | Ancillary works for pipelines and cables | 
                                    
                                        
                                            | 90733500 | Surface water pollution drainage services | Services related to water pollution | 
                                    
                                        
                                            | 71355000 | Surveying services | Engineering-related scientific and technical services | 
                                    
                                        
                                            | 71351810 | Topographical services | Geological, geophysical and other scientific prospecting services | 
                                    
                                        
                                            | 45234116 | Track construction works | Construction work for railways and cable transport systems | 
                                    
                                        
                                            | 50232200 | Traffic-signal maintenance services | Maintenance services of public-lighting installations and traffic lights | 
                                    
                                        
                                            | 45234126 | Tramline construction works | Construction work for railways and cable transport systems | 
                                    
                                        
                                            | 45234121 | Tramway works | Construction work for railways and cable transport systems | 
                                    
                                        
                                            | 61 | Transport For Wales - Core Valley Lines | Sell2Wales Projects | 
                                    
                                        
                                            | 77211300 | Tree-clearing services | Services incidental to logging | 
                                    
                                        
                                            | 77312000 | Weed-clearance services | Planting and maintenance services of green areas | 
                                    
                                        
                                            | 45200000 | Works for complete or part construction and civil engineering work | Construction work |