In terms of wind turbines under 100 kW (‘microgeneration’), we assessed in our Element Energy research that there were 1,100 micro-wind turbines installed in the UK at the end of 2007. The research document can be downloaded at:
http://www.berr.gov.uk/energy/sources/sustainable/microgeneration/research/page38208.html
The following table shows the number of wind turbines above 100 kW generating in the UK at November 2008.
Number Onshore 2,461 Offshore 149 Total 2,610 Source: AEA Technology, January 2009