UK Marine Broadcasting Offences Act 1967 declares participation in offshore pirate radio illegal.

The Marine, &c., Broadcasting (Offences) Act 1967, shortened to Marine Broadcasting Offences Act or Marine Offences Act, became law in the United Kingdom at midnight on Monday 14 August 1967. It was subsequently amended by the Wireless Telegraphy Act 2006 and the Broadcasting Act 1990. Its purpose was to extend the powers of the Wireless Telegraphy Act 1949, beyond the territorial land area and territorial waters of the UK to cover airspace and external bodies of water.

Pirate radio is a radio station that broadcasts without a valid license, whether an invalid license or no license at all. In some cases, radio stations are considered legal where the signal is transmitted, but illegal where the signals are received—especially when the signals cross a national boundary.

August 14 is the 226th day of the year in the Gregorian calendar; 139 days remain until the end of the year.