The Hornsea One OFTO is situated in the southern North Sea about 120km off the East Yorkshire coast.
The OFTO is a 1200MW connection between the generators and onshore transmission system
The three offshore substations are connected to a reactive compensation station by three undersea cables which are up to 84km long. The reactive compensation station is connected to shore by 3 undersea cables which are 65km which come ashore at Horseshoe Point, south of Grimsby. The onshore cables, which are about 38km long, connect to the onshore substation at Killingholme.
Downloadable Documents
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DTPHO Transmission Licence
Size: 942 KB Download -
DTPHO Decommissioning Programme
Size: 2 MB Download -
DTPHO Regulatory Accounts 2024-25
Size: 13 MB Download -
DTPHO Statement on Modern Slavery Act - Issue 2
Size: 146 KB Download -
DTPHO Separation and Independence of the Transmission Business Compliance Statement - Issue 6
Size: 361 KB Download -
DTPHO_Basis of Transmision Owner Charges_2025-26 Issue 7
Size: 292 KB Download -
DTPHO Annual Compliance Report
Size: 258 KB Download -
DTPHO-S-001 Statement on Modern Slavery Act - 05-02-2026
Size: 152 KB Download
