| paving.org.uk | Precast Concrete Paving and Kerb Association |
| kitchen-specialist.co.uk | Kitchen Specialists Association |
| instituteofroofing.org.uk | The Institute of Roofing |
| hbf.co.uk | The House Builders Federation |
| gas-news.co.uk | Gas-News.co.uk |
| fmb.org.uk | The Federation of Master Builders |
| citb.org.uk | Construction Industry Training Board |
| ciria.org.uk | Construction Industry Research and Information Association |
| bufca.co.uk | The British Urethane Foam Contractors Association |
| aecb.net | Association for Environment Conscious Building |
21005