Safety (Railway Infrastructure)
- CIRAS
- Composite Creations
- Gable (UK) Ltd
- Health, Safety & Engineering Consultants
- Hima-Sella Ltd
- Mott MacDonald Group Ltd
- Panasonic Electric Works UK Ltd
- Personal Track Safety (PTS)
- Railway Management Services
- RISC Ltd
- Safeline Training Ltd
- SAFETY, QUALITY AND ENVIRONMENTAL SERVICES LTD
- Scientifics Limited