Westmill Wind Farm Co-operative Ltd is a community-owned Industrial and Provident Society that owns 100% of the Westmill Wind Farm which is an onshore wind farm near the village of Watchfield in the Vale of White Horse, England. It has five 1.3 MW wind turbines erected in a line along the disused runway of the former RAF Watchfield. The wind farm has a power output of up to 6.5 MW, projected to produce as much electricity in a year as used by more than 2,500 homes. The turbines were erected in 8 days and the first fully month of generation was March 2008. It has an open day usually in June each year.