Here are some Useful links which can give you further information on saving water and sustainable building.
Government and related organisations
Waterwise www.waterwise.org.uk
Consumer Council for Water www.ccwater.org.uk
Envirowise www.envirowise.gov.uk
Ofwat www.ofwat.gov.uk
Defra www.defra.gov.uk
Dept of Communities and Local Government www.communities.gov.uk
Environment Agency www.environment-agency.gov.uk
Water industry related
British Water www.britishwater.co.uk
UK Water Industry Research www.ukwir.org.uk
Water Research Council (WRc) www.wrcplc.co.uk
Water Management Society www.wmsoc.org.uk
UK Rainwater Harvesting Association www.ukrha.org
Water Aid www.wateraid.org.uk
Water Guide www.waterguide.org.uk
Water UK www.water.org.uk
Construction industry related
Association for Environmentally Conscious Building www.aecb.net
Construction Industry Research and Information Association (CIRIA) www.ciria.org.uk
Construction Industry Environmental Forum (CIEF) www.cief.org.uk
Centre for Alternative Technologies www.cat.org.uk
Home Builders Federation www.hbf.co.uk
Building Research Establishment (BRE) www.bre.co.uk
BRE Environmental Assessment Method (BREEAM) www.breeam.co.uk
Institute of Plumbing and Heating Engineering www.iphe.org.uk
Federation of Master Builders www.fmb.org.uk
National House Building Council www.nhbc.co.uk