A senior fundraiser for Isis has managed to flee the UK to join the jihadists in Syria.
Security services believe Mohammed Khaled, 45, was sending humanitarian aid money meant for Syrian refugees to Isis.
Khaled, who lived in west London, had been placed on a terror sanctions list and had his assets frozen.
A terrorism finance order had been issued against him, freezing all of his assets in the UK and ordering banks to close down his accounts and block any financial transactions.
Court papers seen by the Daily Telegraph say security services believed Khaled "had in fact gone to Syria in order to engage in terrorist activities there."
It added: His support and funding of Isil were the basis of the order".
The papers reveal he used nine aliases and is one of 23 terror suspects with assets frozen under the act.
Khaled is likely to face an "exclusion order" barring him from returning to the UK.
His escape has raised questions about national security and the Government's ability to control Britain's borders.
