Changes made by 98/23/EC: Council Decision of 19 December 1997 authorising the United Kingdom to extend application of a measure derogating from Article 28e(1) of the Sixth Council Directive 77/388/EEC on the harmonisation of the laws of the Member States relating to turnover taxes
EU Decision 1998/23
No changes made by 98/23/EC: Council Decision of 19 December 1997 authorising the United Kingdom to extend application of a measure derogating from Article 28e(1) of the Sixth Council Directive 77/388/EEC on the harmonisation of the laws of the Member States relating to turnover taxes are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.