Swedish developer Vattenfall (corporate.vattenfall.com) has unveiled the latest designs for its 1.8GW Norfolk Vanguard offshore wind farm off the east coast of the UK.

The company published the results of initial survey work in its preliminary environmental information report at the end of October, which will inform the project’s final design plans.

Vanguard will feature up tp 257 turbines (between 7MW and 20MW), and the company said it is still deciding on a range of foundation types for the project — including jackets, monopiles, gravity base, suction caisson and floating designs.

The report includes plans for up to six cables that will bring power ashore just south of Happisburgh. Vattenfall has narrowed the possible locations for onshore booster stations down to two sites — one at Ridlington, the other east of Crostwright.

The project will connect to the National Grid at the Necton sub-station in Norfolk, which will need to be enlarged.

The company is running formal consultations until 11 December, before submitting a Development Consent Order to the UK Planning Inspectorate next summer.