<p>Total constraint payments for generators of all types since 2009 are as follows:</p><p><table><thead><tr><td valign="top" /><td valign="top"> £million <br /></td></tr></thead><tbody><tr><td valign="top">2008-09<br /></td><td valign="top">263<br /></td></tr><tr><td valign="top">2009-10<br /></td><td valign="top">139<br /></td></tr><tr><td valign="top">2010-11<br /></td><td valign="top">170<br /></td></tr><tr><td valign="top">2011-12<br /></td><td valign="top">325<br /></td></tr><tr><td valign="top">2012-13<br /></td><td valign="top">170<br /></td></tr></tbody><tfoot><tr><td valign="top"> Source: <br />NationalGrid publisheddata<br /></td></tr></tfoot></table></p><p>The Department does not hold data on the breakdown of constraint payments for each type of technology. National Grid has advised that details of most individual constraint payments to generators are published at:</p><p>www.elexon.co.uk#</p><p>and</p><p>www.bmreports.com</p><p>and some aggregated data, including an explanation of constraint payments made to wind generation, is published in its ‘Monthly Balancing Services Summary’, available at:</p><p>www.nationalgrid.com/uk/Electricity/Balancing/Summary</p>