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<p>The main mechanism of support for biomass1 power generation is the Renewables Obligation
(RO). An estimate of support can be made by applying the share of RO certificates
(ROCs) redeemed by suppliers, originating from biomass generation, to overall RO expenditure.
This is given in the table below for 2011/12 to 2013/14.</p><p> </p><p> </p><p> </p><table><tbody><tr><td>
</td><td><p><em>RO total expenditure (£m nominal)</em></p></td><td><p><em>Biomass
share of ROCs redeemed (%)</em></p></td><td><p><em>Estimated biomass support under
the RO (£m nominal)</em></p></td></tr><tr><td><p><strong><em>2011/12</em></strong></p></td><td><p>1,458</p></td><td><p>33.5</p></td><td><p>488.4</p></td></tr><tr><td><p><strong><em>2012/13</em></strong></p></td><td><p>1,991</p></td><td><p>31.9</p></td><td><p>635.1</p></td></tr><tr><td><p><strong><em>2013/14
(P)</em></strong></p></td><td><p>2,599</p></td><td><p>27.9</p></td><td><p>725.1</p></td></tr></tbody></table><p>
</p><p> </p><p> </p><p>2013/14 data are provisional, Ofgem’s annual report will be
published in February 2015.</p><p> </p><p>RO expenditure published in Ofgem’s RO annual
reports, available at:</p><p> </p><p><a href="https://www.ofgem.gov.uk/environmental-programmes/renewables-obligation-ro"
target="_blank">https://www.ofgem.gov.uk/environmental-programmes/renewables-obligation-ro</a></p><p>
</p><p>ROCs redeemed by technology available at:</p><p> </p><p><a href="https://www.renewablesandchp.ofgem.gov.uk/Public/ReportManager.aspx?ReportVisibility=1&ReportCategory=0"
target="_blank">https://www.renewablesandchp.ofgem.gov.uk/Public/ReportManager.aspx?ReportVisibility=1&ReportCategory=0</a>
<em>(Compliance certificates report)</em>.</p><p> </p><p>Domestic combustion of biomass
in the UK is currently supported by the Renewable Heat Incentive (RHI), but was previously
covered by the Renewable Heat Premium Payment (RHPP) until April 2014. The table below
gives figures for the amount of subsidy biomass boilers received in the last 3 years:</p><p>
</p><p> </p><p> </p><table><tbody><tr><td><p><strong>Year</strong></p></td><td><p><strong>Total
Spend on Biomass Boilers (Nominal Prices)</strong></p></td></tr><tr><td><p>2014</p></td><td><p>£1.9m</p></td></tr><tr><td><p>2013</p></td><td><p>£1.5m</p></td></tr><tr><td><p>2012</p></td><td><p>£0.9m</p></td></tr></tbody></table><p>
</p><p> </p><p> </p><p> </p><p> </p><p><em><strong>[1]</strong></em><em> There is
no single category for “biomass” under the RO. In this answer, we have defined biomass
as the following generation types: Anaerobic Digestion, ACT, bioliquids, dedicated
biomass, biomass conversions, EfW, landfill and sewage gas and CHP technologies. </em></p><p>
</p><p> </p><p> </p><p> </p><p> </p><p> </p>
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