| Geodesys | www.geodesys.com |
| Green Alliance Trust | www.green-alliance.org.uk |
| Greenpeace | www.greenpeace.org.uk |
| Hammonds | www.hammonds.com |
| Health & Safety Executive (HSE) | www.hse.gov.uk |
| Health Protection Agency | www.hpa.org.uk |
| Help the Aged | www.helptheaged.org.uk |
| Horticultural Trades Association | www.the-hta.org.uk/hta |
| House Builders Federation | www.hbf.co.uk |
| Independent Age | www.independentage.org.uk |
| The Institute for Sport, Parks and Leisure (ISPAL) | www.ispal.org.uk |
| Institute for Public Policy Research (IPPR) | www.ippr.org.uk |
| Institute of Economic Affairs (The IEA) | www.iea.org.uk |
| Institute of Engineering Designers | www.ied.org.uk |
| Institution of Civil Engineers (ICE) | www.ice.org.uk |
| Institution of Water Officers (IWO) | www.iwo.org.uk |
| International Water Association (IWA) | www.iwahq.org.uk |
| Italy - FederUtility | www.federutility.it |
| Jersey New Waterworks Company Limited | Not available |
| Joint Nature Conservation Committee (JNCC) | www.jncc.gov.uk |
