In his indictment of the Spanish al Qaeda cell, Judge Garzon described London-based Abu Qutada as the "spiritual leader of the mujahedin in Europe."
Very interesting. England is clearly the "mothership" for many of these operations. If I recall correctly, some Islamic figure said, when told that the US was looking at Iraq and other countries as the protectors and homes of terrorists, that we should look first at England.
I also think that we will see more Spanish connections emerging, because Spain has a large undocumented (i.e., illegal immigrant) Muslim population and very loose borders.