Swinging Radio England ("SRE") was a top 40 offshore commercial station billed as the ""World's Most Powerful"" that operated from 3 May 1966 to 13 November 1966 from a ship in the North Sea, four and a half miles off Frinton-on-Sea, Essex, England. While the station was dubbed a pirate radio station, its operation took place within the law and its offices were in the West End of London. Its representation was by a company formed earlier in the year to represent in Europe the ABC radio and television stations of the United States.