Changes to Twelfth Council Company Law Directive of 21 December 1989 on single-member private limited-liability companies (89/667/EEC)
EU Directive 1989/667
Made by Council Directive 2006/99/EC of 20 November 2006 adapting certain Directives in the field of company law, by reason of the accession of Bulgaria and Romania
From legislation.gov.uk's record of changes, the official one: see it there.