Foundation types being considered for London Array include:
• Steel monopile - a hollow diameter steel cylinder driven into the seabed
• Gravity base foundation - a large concrete/steel structure that sits on the seabed
• Tripod foundation - a frame with three or more legs pinned to the seabed, usually using driven steel piles

A final decision on the type of foundation will be made during the detailed design phase when more information is known about the nature of the seabed at each turbine location.