>> while the U.S. won’t be able to use information obtained from British firms in any cases carrying the death penalty.

Lol. So I guess it cannot be used for actual terrorism. They can use it up until an act of terrorism occurs. Then, now that murder charges are on the table, they cannot use the same date source to catch the perpetrators? The US isn't going to waive the death penalty on every terror case. That isn't politically possible.

We have to just admit that US laws are increasingly incompatible with those of the rest of the world. Treaties are getting harder and harder to reconcile. The US needs to back off its departure from international norms.