Young 'jihadist' on leaving Britain to fight
4 July 2014 Last updated at 11:23 BST
A British man who claims to have been fighting in Syria says he will only return to the UK to "raise the black flag of Islam over Downing Street and Buckingham Palace".
The man, who is in his twenties, says he has been fighting for a year alongside a number of groups including The Al Nusra Front, who are linked to Al Qaeda.
He told Nicky Campbell on BBC Radio 5 live's Breakfast how his family reacted when they discovered he had gone to Syria.
Warning: Some people may find the nature of this interview disturbing or offensive.