- CPA (Construction Plant Association) www.cpa.uk.net
- FTA (Freight Transport Association) www.fta.co.uk
- Gas Safe Register www.gassaferegister.co.uk
- Health & Safety Executive www.hse.gov.uk
- Investors in People www.investorsinpeople.co.uk
- MPBA (Modular & Portable Building Association) www.mpba.biz
- PSE (Portable Sanitation Europe) www.pse.org.uk
- RHA (Road Haulage Association) www.rha.uk.net
