Case C-86/11: Judgment of the Court (Fourth Chamber) of 25 April 2013 — European Commission v United Kingdom of Great Britain and Northern Ireland (Failure of a Member State to fulfil obligations — Taxation — Directive 2006/112/EC — Articles 9 and 11 — National legislation permitting the inclusion of non-taxable persons in a group of persons who may be regarded as a single taxable person for VAT purposes)