Moazzam Begg, a former Guantanamo Bay detainee of Pakistani origin, was on Saturday remanded in custody after British police charged him with terror offences related to Syria.
Begg appeared at Westminster Magistrates Court and denied charges of providing terrorist training and funding terrorism overseas.
Gerrie Tahari, a 44-year-old woman arrested at the same time as him last Tuesday and charged with facilitating terrorism overseas, was also remanded in custody.
Two other men arrested the same day on suspicion of facilitating terrorism overseas remain in police custody.
Begg is a British citizen, who moved to Afghanistan with his family in 2001, before moving again to Pakistan in 2002 when the Afghanistan war started.
He was arrested in Islamabad in January 2002 and taken to Bagram internment centre in Afghanistan for about a year before being transferred to the Guantanamo camp.