In March 2011, the Government announced the first review of the scheme. The review will be completed by the end of 2011 and current tariffs will probably remain unchanged until April 2012. The review will examine all aspects of the scheme with a focus on large-scale solar projects, which have been more popular than envisaged, and a review of tariff rates for farm-based Anaerobic Digestion plants, as fewer of these plants have been accredited than expected.