Legendary punk band BLACK FLAG has reformed and will play this year's Hevy Fest, set to take place August 2-4 in Port Lympne Wild Animal Park in Kent. The group's only 2013 appearance in the U.K. will mark the first time in 30 years that the band’s played in the country.BLACK FLAG's lineup for the show will include singer Ron Reyes, who was a member of the band during 1979-1980 (after Keith Morris but before Dez Cadena) and was featured on the "Jealous Again" EP. He will be joined by guitarist and founder Greg Ginn as well as bassist Chuck Dukowski and drummer Roberto "Robo" Valverde. "They have undoubtedly had the greatest impact on DIY record distribution, underground touring and hardcore music of any band, before or since," Hevy Fest's announcement reads. "There is a whole generation of musicians and fans that would cite BLACK FLAG as being the most important band to have influenced them, without ever even having the chance to see them perform live, until now." Vocalist Henry Rollins joined BLACK FLAG in 1981 and left five years later. He has since released several music albums and established himself as a spoken-word artist and book author.