Advantages of mains supplied smoke detectors. The Benefits of having RCD protection. Energy Efficient LED Lighting. Trent and Peak Archaeological Trust Office and Warehouse Refurbishment. D&S Electrical Services is a registered NICEIC company and carries out work in the Domestic,Commercial and Industrial sectors, it is all done in accordance with BS7671 17th edition wiring regulations. Please click on the relevant heading to see examples of work that we do. Services include new installation, maintenance.