Commission Regulation (EU) No 761/2013 of 6 August 2013 establishing a prohibition of fishing for sandeel and associated by-catches in EU waters of IIa, IIIa and IV and EU waters of sandeel management areas 1, 2, 3, 4 and 6, excluding waters within six nautical miles of UK baselines at Shetland, Fair Isle and Foula, by vessels flying the flag of United Kingdom