| All |
| A Railway Civil Engineering |
| A0 Adhesives and Sealants |
| A1 Anti Slip Products |
| A5 Architectural Services |
| A10 Barriers |
| A15 Bridge Beams/Bearings/Parapets |
| A20 Building/Civil Engineering/Construction Products/Services |
| A25 Coatings/Paints/Pre-coated Materials |
| A30 Composite Materials |
| A35 Corrosion Protection |
| A40 Culverts |
| A45 Drainage Products |
| A50 Earthworks |
| A55 Earthworks Stabilisation |
| A60 Falsework |
| A65 Fencing |
| A70 Fixing Systems |
| A75 Geotechnical Engineering Equipment/Services |
| A80 GRC (Glass-Reinforced Concrete) Fixtures/Fittings |
| A85 GRP (Glass-Reinforced Plastic) Fixtures/Fittings |
| A90 Immersed Tubes |
| A95 Land Surveying Equipment |
| A100 Lighting |
| A105 Pipe and Cable Location Equipment |
| A110 Precast Concrete Units |
| A115 Quantity Surveying |
| A120 Ready Mixed Concrete |
| A125 Tunnel Equipment |
| B Track Design, Supply and Construction |
| B1 Acoustics/Track Noise/Vibration Control |
| B5 Ballast |
| B10 Buffer Stops |
| B15 Fasteners |
| B20 Freight Yard Equipment |
| B25 Level Crossings |
| B30 Permanent Way Design |
| B35 Point Machines |
| B40 Points/Crossings and Components |
| B45 Rail Fastenings |
| B50 Rail Lubricators |
| B55 Rail Welding |
| B60 Rails |
| B65 Sleepers |
| B70 Switch Heating Control/Monitoring Equipment |
| B75 Track Materials and Permanent Way Equipment |
| B80 Welding Products/Services |
| C Track and Infrastructure Maintenance |
| C1 Access Equipment |
| C5 Bridge Maintenance/Monitoring |
| C10 Contracting Services |
| C15 Graffiti Protection/Removal |
| C20 Infrastructure Maintenance |
| C25 Infrastructure Services |
| C30 Lubricants |
| C35 Possession Management |
| C40 Rail Haulage Operations |
| C45 Rope Access/Inspection/Maintenance |
| C50 Track Maintenance Equipment, Materials and Services |
| C55 Track Renewal Equipment |
| C60 Trackside Pest Control |
| C65 Tunnel Maintenance |
| C70 Vegetation Control |
| C75 Wagon Hire |
| D Electrification |
| D1 Circuit Breakers |
| D5 Conductor Rail Systems |
| D10 Current Collection Equipment |
| D15 Electrification Equipment/Services |
| D20 Switchgear Equipment |
| D25 Trackside Power Supply Equipment |
| E Signalling and Communications |
| E1 Automatic Train Control |
| E5 Batteries |
| E10 Communications Systems and Equipment |
| E15 Emergency Signalling Equipment |
| E20 Enclosures |
| E25 Mimic Diagrams |
| E30 Relays/Relay Control Boxes |
| E35 Remote Control/Tracking Equipment |
| E40 Signalling Maintenance/Renewal |
| E45 Signalling/Train Control Systems |
| E50 Surge Protection |
| E55 Telecommincations |
| E60 Uninterruptable Power Supplies |
| F Depot and Workshop Equipment and Services |
| F1 Chemicals |
| F5 Cleaning Materials/Services |
| F10 Depot and Workshop Equipment |
| F15 Industrial Space Heating Equipment |
| F20 Stores |
| F25 Train Washing Plant/Equipment |
| F30 Vehicle Lifting Equipment |
| F35 Vehicle/Vehicle Component Maintenance/Repair/Overhaul |
| F40 Wheel Flange Lubrication |
| G Plant and Equipment |
| G1 Accommodation Units |
| G5 Cranes, Rerailing and Lifting Equipment |
| G10 Engineering Tools and Equipment |
| G15 General Engineering |
| G20 Hoses and Assemblies |
| G25 Hydraulic Loading Equipment |
| G30 Industrial Locomotives |
| G35 Instrumentation |
| G40 In-Vehicle Storage Equipment |
| G45 Plant Hire |
| G50 Portable Buildings |
| G55 Power Tools |
| G60 Road-Rail Vehicles |
| G65 Steel Fabrications |
| G67 Storage Equipment |
| G70 Tools |
| H Safety and Security Systems |
| H1 Access Control |
| H5 Closed Circuit Television |
| H10 Emergency Equipment |
| H15 Fire Protection/Detection/Control |
| H20 Rerailing Equipment |
| H25 Safety Equipment/Services |
| H27 Safety Reporting System |
| H30 Security Equipment/Services |
| H35 Warning Systems |
| J Electrical Products & Equipment |
| J1 Cables/Cable Accessories |
| J5 Cathodic Protection |
| J10 Connectors |
| J15 Generating Equipment |
| K Measurement, Monitoring and Testing Systems |
| K1 Condition Monitoring Systems |
| K5 Gauging Equipment |
| K10 Inspection Services |
| K15 Inspection Vehicles |
| K20 Laser Systems/Equipment |
| K25 Measuring Equipment |
| K30 Profile Measuring Equipment |
| K35 Sensors |
| K40 Test and Monitoring Equipment |
| K45 Track Recording/Monitoring Systems |
| K50 Ultrasonic Flaw Detection |
| K55 Vibration Measurement/Control |
| K60 Weighing Systems |
| L Information Technology |
| L1 Computer Aided Design |
| L5 Computer Hardware and Software, Management Systems |
| L10 Stock Control Systems |
| M Station Equipment and Passenger Technology |
| M1 Booking Office Equipment |
| M5 Change Machines |
| M10 Clock Systems |
| M15 Escalators/Travelators |
| M20 Facilities for Mobility Impaired Passengers |
| M25 Fare Collection, Tickets and Ticketing Equipment |
| M30 Lifts |
| M35 Passenger Information Systems |
| M40 Platform Doors |
| M45 Signage |
| M50 Station Equipment/Furnishings |
| M55 Timetables |
| M60 Windows and Related Equipment |
| N Human Resources and Occupational Health |
| N1 Clothing / Workwear |
| N2 High Visability Clothing |
| N5 Medical and Occupational Health Services |
| N10 Recruitment/Personnel Services |
| N15 Simulation Systems |
| N20 Training Services |
| P Consultancy And Specialised Services |
| P1 Advertising / Marketing |
| P5 Asset Management |
| P10 Associations / Institutions |
| P15 Certification of Management Systems |
| P20 Consultancy Services |
| P25 Design Services |
| P27 Electromagnetic Compatibility (EMC) - Consultancy, Testing and Training |
| P30 Ergonomics and Human Factor Consultants |
| P35 Environmental Consultancy/Control/Protection/Testing |
| P40 Government Services |
| P45 Graphic Design |
| P50 Insurance Services |
| P55 Major Projects and Redevelopment |
| P60 Photographic Services |
| P65 Project Management |
| P70 Quality Assurance/Certification/Control |
| P72 Rail Events |
| P75 Research/Development/Testing |
| P80 Risk Assessment |
| P85 Supplier Assessment |
| P90 Technical Documentation |
| P95 Trade/Technical Publications |