This is a MEIWC (Minor Electrical Installation Works Certificate) in the format of a PDF. You can fill out the details using any PDF reader. It is derived from the IET model forms, at: http://electrical.theiet.org/wiring-regulations/forms/2015-amd3-forms.cfm?type=pdf There is a copyright notice on the IET model form, I believe this derivation is in compliance with this, provided it is not used for resale.
Done by @happysteve (using OpenOffice)
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MEIWC - PDF form (editable) - BS7671 Amendment 3:2015 model form 2016-10-08
PDF form, with fields you can fill in using any PDF reader. Pretty close to the IET model form.