Millbrook - 400kV GIS National Grid substation  Principal Contractor, and Simms client: Vinci Energies Value to Simms- £4m - Ditch / river diversion, 300m - Access roads, 350m - Earthworks  - Full 5000m2 substation platform build - Large drainage scheme - Multicore ducting - HV ducting - All RC works  - Culverts - Excavation / backfill for earthing - Works directly under pylon structure - Bund construction