CMC Aluminium joined the Trusted Trader scheme in 2015. Derbyshire Trusted Trader helps you find honest and reliable traders who commit to doing a good job for a fair price. They know that finding the right trader can be a big worry. Derbyshire trading standards check out all the businesses on the Derbyshire Trusted Trader register. These checks are not just a one-off; most of them are repeated annually and they continually monitor customer feedback to try to make sure that all Trusted Traders are maintaining the standards of the scheme.