Since the attacks on New York and Washington, British intelligence has been drawing up alist of Islamic radicals - some linked to al-Qaeda - who are regarded as a security threat to Britain and other countries.
Iraq has also told the inspectors that it will comply with a deadline of December 8th to submit to the UN a full list of any activities which could be linked to making weapons of mass destruction.
The names of two of Mr Papaconstantinou's cousins and their husbands were on the original list, linked to two accounts in a Swiss HSBC branch, court officials say.
Spain's Interior Minister Mariano Rajoy on Thursday called the lista "great step forward" because it included several organisations linked to ETA, which has claimed the killings of 800 people in a 33-year shooting and bombing campaign to secure independence for Spain's northern Basque region.