Allen & Overy (A&O) and Linklaters have both landed roles on a £1.3bn financing deal for one of the world's largest offshore wind farms.

The pair has advised on the financing for the 402MW Dudgeon Offshore Wind Farm, which is due to be built 20 miles off the north Norfolk coast.

A&O advised the consortium of nine banks financing the deal, which includes Siemens Bank, Societe Generale, and Credit Agricole Corporate and Investment Bank.

The firm's team on the deal was led by London-based project finance partner Chris Andrew and included projects partner Sheila Connell.

Andrew said the deal was a "landmark" as it was reached under the government's new and complex 'contract for difference' system, which guarantees developers a set price for the electricity they produce.

He added: "Detailed preparatory work meant financing on this project was nevertheless executed very quickly."

Linklaters advised the sponsors of the project with a team led by projects partner John Pickett.

The developers of the wind farm are Norwegian oil & gas company Statoil, Abu Dhabi renewable energy company Masdar and Norway's state-owned electricity company Statkraft – which own 35%, 35% and 30% of the project respectively.

The wind farm is set to be operational in 2017.

Other key wind farm developments have seen Herbert Smith Freehills and Baker & McKenzie both land roles on the acquisitions of two Australian wind farms by Southeast Asian energy giants Malakoff and Electricity Generating Public Company in 2013.

In 2010, Norton Rose and Eversheds landed the lead roles on £100bn of wind farm projects being developed in part by the Crown Estate, which owns much of the seabed around the UK. DLA Piper, Scots firm McGrigors and legacy Bond Pearce all also landed roles on the projects.