If you applied to the Renewable Obligation (RO) scheme before it closed recently, or are trying to achieve RO accreditation you may require an Independent Technical Assurance Report (ITAR). The ITAR is required at Ofgem discretion, but usually for sites where evidence of generation is limited. This could be if your site has no grid connection, exports very little electricity to the grid, or uses a large majority of the generated electricity on site. In these circumstances, Ofgem requires third party verification of your metering arrangements, details of the electricity users and ongoing record keeping, all of which will be included in the ITAR.
In summary, an ITAR provides independent assurance to Ofgem that your site is claiming the appropriate number of ROCs. The ITAR also proves to Ofgem that your generator is capable of producing electricity in the absence of half hourly data to verify this. If you think you may be affected, get in touch with Oli Coe or Andrew Moreby on 024 7669 8899.