Controversial Irish group Kneecap have urged their fans to turn up at court to support them when a band member faces a terror charge.

The band are set to spark fresh outrage after using their first festival headline gig to drum up support for them at next month's court appearance for band member Liam Óg Ó hAnnaidh, stage name Mo Chara.

They urged 20,000 fans at London's Wide Awake festival on Friday night to attend Westminster Magistrates Court in central London on June 18 to support him.

The 27-year-old has been charged by the Metropolitan Police under the Terrorism Act for allegedly displaying the flag of Hezbollah, a banned terror group in Britain, at a gig last November.

He told fans at Brockwell Park: 'The world needs to see the solidarity of 20,000 people.'