Yes you can supply the materials.
This may sometimes be a cheaper option, but remember materials supplied by me that become defective will be replaced free of charge during the first twelve months from date of invoice. After the initial twelve month period any remaining manufacturers warranty will still apply, although this may not include labour.
Also if you supply the materials, it will be up to you to make sure they meet safety standards and where applicable, the correct IP ratings. Any items not conforming to British Safety Standards, or will not conform to current regulations, will not be fitted. If an item is defective or becomes defective, any labour required will be chargeable.
