Published 17 March 2026

White Cross is a proposed floating offshore windfarm being developed by Flotation Energy Ltd, located approximately 50 km off the Devon coast. The project will comprise eight wind turbine generators supported by innovative floating substructure technology anchored to the seabed, with a total generating capacity of up to 100 MW.

Electricity generated by the windfarm will be exported to shore via subsea cables making landfall at Saunton Sands, before routing south to either a new or existing substation at East Yelland. The project represents an important step in the deployment of floating wind technology and the expansion of the UK’s renewable energy capacity.

Flotation Energy Ltd appointed Stockton Drilling Ltd to undertake a constructability review for the formation of the export cable landfalls and two onshore crossings using trenchless installation methods. Stockton Drilling Ltd subsequently appointed our team to deliver a feasibility study to support the project through the planning stage.

Our specialists provided a detailed technical assessment of trenchless options for both the landfall and onshore crossings, helping to increase technical and cost certainty for the proposed works. Our services included site walkover surveys by our engineering geologists, geological assessment and ground modelling based on desk study review and historic ground investigation data, and 3D design of landfall profiles using onshore topographic and offshore bathymetric datasets.

We also undertook 3D design of the onshore trenchless crossings, prepared ground investigation specifications, and provided ground investigation supervision and reporting. A geotechnical interpretative report and risk register were produced, alongside a landfall feasibility report and outline design drawings.

Our work supported Flotation Energy Ltd in developing an efficient design solution for the northern landfall at Saunton Sands. By identifying an approach that enabled the same drilling plant to be used for both the landfall and the northern onshore crossing, with re arrangement on site between works, which will help to streamline construction and improve overall project efficiency.