Former Guantanamo Bay detainee Moazzam Begg has pleaded not guilty to seven terrorism charges.
Appearing at the Old Bailey, Mr Begg, 45, from Birmingham, denied attending a terrorist training camp in Syria.
He also denied possessing documents for a purpose connected to terrorism and terrorist funding.
Mr Begg, who was held in the US-run military prison at Guantanamo Bay in Cuba for nearly three years, will face trial in October.
He is charged with one count of attending a terrorism training camp in Syria between 9 October 2012 and 9 April 2013.
Five charges are related to the possession of "an article" for a purpose connected to terrorism between 31 December 2012 and 26 February 2014.
He is also charged with funding terrorism by making available a Honda generator between 14 July and 26 July 2013.
Appearing via video link, Mr Begg sat throughout the hearing and said "not guilty" as each of the charges was read out.
The British national was detained in Pakistan in January 2002 and taken to Bagram internment centre in Afghanistan for about a year before, being transferred to the Guantanamo camp.
He has never previously been charged with an offence.