Tony Blair is on our side. The Brits just have their own constitutional issues to deal with. Their equivalent of the supreme court just ruled today that indefinite incarceration without trial is illegal. I expect the Brits are simply letting these guys go so they can lead them to something bigger...like whoever recruited them in the first place.
We will definitely have guys trailing them.
The media as well. They will be followed and kept tabs on for the rest of their lives.