| National Assembly for Wales | www.wales.gov.uk |
| National Audit Office | www.nao.gov.uk |
| National Consumer Council | www.ncc.org.uk |
| National Farmers Union (NFU) | www.nfu.org.uk |
| National Housing Federation | www.housing.org.uk |
| National Information Forum | www.nif.org.uk |
| National Institute for Health and Clinical Excellence | www.nice.nhs.uk |
| National Society for Clean Air & Environmental Protection | www.nsca.org.uk |
| National Trust | www.nationaltrust.org.uk |
| Natural England | www.naturalengland.org.uk |
| Natural Environment Research Council (NERC) | www.nerc.ac.uk |
| Northern Ireland Assembly | www.niassembly.gov.uk |
| Northern Ireland Department for Regional Development | drdni.gov.uk |
| Northern Ireland Water Service | www.waterni.gov.uk |
| Northumbrian Water Ltd | www.nwl.co.uk |
| Office for the Regulation of Electricity and Gas (for Northern Ireland) (OFREG) | ofreg.nics.gov.uk |
| Office of the Deputy Prime Minister | www.odpm.gov.uk |
| Office of Fair Trading (OFT) | www.oft.gov.uk |
| Office of Gas and Electricity Markets (OFGEM) | www.ofgem.gov.uk |
| Office of Communications (OFCOM) | www.ofcom.org.uk |
| Office of the Rail Regulator (ORR) | www.rail-reg.gov.uk |
| Ofwat (now Water Services Regulatory Authority) | www.ofwat.gov.uk |
| The Patients Association | www.patients-association.org.uk |
| The Pipeline Industries Guild | www.pipeguild.co.uk |
| Portsmouth Water plc | www.portsmouthwater.co.uk |
| Portuguese Water and Wastewater Association | www.apda.pt |
