Our Services Our Projects Search Before You Work About Us Contact Us Our Services Diamond Transmission Partners invests in offshore transmission systems as an Offshore Transmission Owner (“OFTO”). Diamond Transmission Partners owns and operates offshore transmission businesses in the UK. An OFTO transports electrical energy from the large offshore wind farms to the onshore high voltage transmission system, transmitting green energy to UK consumers. The diagram illustrates the scope of the OFTO which includes an offshore substation, which connects the offshore wind farm, offshore and onshore cables and an onshore substation, where the system connects to the onshore grid. Generation Assets Turbines, foundations and inter-array cables e.g. Wind turbine e.g. 34kV inter-array cables e.g. 220kV export cables Transmission (OFTO) Assets Offshore substation, export cable, onshore substation & connection to grid Offshore substation Onshore substation Copyright 2021 © Diamond Transmission Partners Web design by Edge of the Web

Our Services Our Projects Search Before You Work About Us Contact Us About us Diamond Transmission Partners is composed of several investors each specific to a project partnership. For details of the partners for each project, click links below: Walney Ext OFTO Galloper OFTO Race Bank OFTO Burbo Bank Extension OFTO Hornsea One OFTO DTC is a wholly owned subsidiary of Mitsubishi Corporation ("MC”) since 2012 which is one of the largest Japanese trading and investment houses. MC has established DTC in London as a holding company to integrate MC's investment activities in European transmission sector. As of January, 2018, DTC has 9 assets in the UK and Germany totalling circa 4.4GW and c.£3.6bn. Visit Mitsubishi Corporation HICL is a long-term equity investor in infrastructure. Its portfolio comprises more than 100 investments with value in excess of £2.0bn. HICL is present in a number of sectors including health, transport and education, both in the UK and overseas. Visit HICL Infrastructure CEPCON (Chubu Electric Power Company Netherlands B.V.) is a wholly owned subsidiary of Chubu Electric Power Co., Inc.("Chubu"), which as a whole Chubu group is a major transmission operator in Japan with responsibility for over 12,000km of transmission lines and 900 substations. Chubu's total assets as of March 2020 is £40.7 billion. Visit Chubu MUL Infrastructure UK Limited (“MIUK”) is a wholly owned subsidiary of Mitsubishi HC Capital Inc. (“MHC”). MHC has established MIUK as an investing arm for MHC’s investment activities in European infrastructure. MHC has made investments in renewables, power transmission, power distribution and water business as these sectors being MHC’s strategic areas. Visit MHC Main Business Service Providers Diamond Transmission UK Limited ("DTUK") is engaged by the Directors of Diamond Transmission Partners to provide management and financial services to Diamond Transmission Partners. Copyright 2021 © Diamond Transmission Partners Web design by Edge of the Web