As part of the contract for difference (CfD) subsidy, Decc has released the supply chain plan for the successful projects.
In February, East Anglia One and Mainstream's Neart Na Gaoithe projects were awarded subsidy contracts by the government in the first competitive auction for the CfDs.
The August 2014 plan details the work Scottish Power, its parent company Iberdrola, and then-project partner Vattenfall has done in encouraging suppliers and reducing costs for the project and its support for innovative technologies.
A part of the project, between three and five turbine locations, could be used as a turbine or foundations test site. Scottish Power said the test site would be use to encourage new suppliers into the market.
Scottish Power is also planning to use a HVDC transmission system, similar to the connections in Germany.
It would be the first project in the UK to use the system, which collects power from several projects before transmitting it back to the mainland. This would help the further development of the East Anglia Zone, which could include another 11 projects.
Finally, the supply chain report reveals that 12 wind turbine manufacturers were approached for East Anglia One.
Seven of the companies, the plan said, were "new or less established" in the offshore wind sector. Six of the companies took part in the formal tender process with three being shortlisted.
The plan said the three shortlisted turbines had not been deployed at a commercial offshore site up to the date of the report.
Vattenfall sold its stake in the project the same day East Anglia One was awarded a CfD subsidy. It remains part of the consortium developing the East Anglia Zone.