Kentish Flats Extension

Kentish Flats Extension is a small, nearshore extension to the original Kentish Flats offshore wind farm in the Outer Thames Estuary, developed and operated by Vattenfall. The project was conceived as an incremental, lower-cost addition to an existing site and was granted consent in 2013; construction proceeded through 2014–2015 and the extension entered commercial operation in 2015. The scheme was attractive because it reused established onshore and nearshore infrastructure and the existing cable corridor, minimising new consenting complexity and lowering installation costs compared with a greenfield offshore site. During development Vattenfall positioned the extension as a demonstration of cost-reduction through reuse and learning from earlier projects, and the company ran local operations from its Ramsgate base to integrate the new assets with its Kent portfolio. The build phase involved seabed preparation, installation of foundations and export/inter-array cabling into Hampton Pier landfall with onward connection to the Red House Farm substation, and was delivered on a modest capital budget that Vattenfall reported at roughly the same scale as contemporary small extensions. Commercially, the project illustrated the Crown Estate’s initiative to encourage extensions to existing sites and helped maintain local supply-chain activity in a year when few other UK offshore projects were under construction. Since commissioning the extension has been operated alongside Vattenfall’s other Kent assets from the same local operations team.