D. Massey Electrical Services Ltd is a small family run business which has been servicing the transport industry since 1987. We can also customise solutions to problems you may face. For example, we designed and installed a new pit lighting system at Golders Green and Morden Depots, installing over 1000 lights, reducing the running energy costs of both sites. We are currently operating on a 3 month basis, testing and inspecting all DC assets and some AC assets at Golders Green and Morden depots on the Northern line. Once assets are tested, we produce test sheets to this affect and all items are tested to London Underground standards. At this moment we only test the exterior assets on the Northern line, apart from a couple of assets which are situated within the 2 depots ie: 20Kva, 5Kva UPS and depot track earth leakage units. We also, on a quarterly basis, inspect and maintain the interior assets at Stratford Market Depot on the Jubilee line, and again produce test sheets which are approved by London Underground.