Derbyshire County Council operates a ‘Trusted Trader’ scheme.
The scheme is run by the Council’s Trading Standards department.
Trusted Traders are expected to trade ‘legally, honestly and fairly’, and are subject to sanction if they are found to have provided a sub-standard service. In the unlikely event that things go wrong when you use a Trusted Trader then Trading Standards will get involved to help resolve matters.

You can search for a Trusted Trader here, using a simple search that will show traders within a radius of your home.