| ggf.org.uk | Glass and Glazing Federation |
| fmb.org.uk | The Federation of Master Builders |
| lightingassociation.com | The Lighting Association - Europe's Largest Lighting Association |
| fensa.co.uk | Fensa |
| builders.org.uk | The National Federation of Builders |
| thegmcgroup.com | The Guild of Master Craftsmen |
| paintingdecoratingassociation.co.uk | Painting And Decorating Association |
| niceic.org.uk | National Inspection Council for Electrical Installation Contracting (NICEIC) |
| hvca.org.uk | Heating And Ventilating Contractors' Association |
| eca.co.uk | Electrical Contractors Association |
United Kingdom , ,