In 2003 an application was submitted by Cirrus Energy to the DTI (now BERR) for the development of a 324MW (90 turbine) offshore windfarm, located on a sandbank protruding 20km out from the coast between Blackpool and Cleveleys. The development was commonly known as the Shell Flat Offshore Windfarm.

In January 2007 a new application was submitted for a relocated site to the north of the original location to mitigate a number of issues that arose. This new site was renamed Cirrus Shell Flat Array (CSFA). The CSFA windfarm proposal is for upto 90 turbines with a maximum total nominal rating of up to 284 MW. The S36 application is currently in the planning process.
In November 2008 it was decided to close down this development.
More information about this can be found here.