In the event of any information being particularly sensitive, there is available a network of couriers that reports to the staff of the Defense Courier Service stationed at NSA headquarters in Fort Meade, Maryland. Every day interceptions are planned together, new targets are decided on, the management of satellites and of computers is coordinated, and information is exchanged. In short, everything works like a gigantic shared system. Above all, it is as though Britain had decided not to join the European Union, a move by which it has forged a strategic alliance with the very same countries that it spies on together with or on behalf of the United States. Over and above any British declaration of loyalty to the European cause, the truth is that this extremely close U.S.-British relationship has weighty political, diplomatic, and economic repercussions and is more important than any European alliance.
Experts tend to rule out such a move.
British involvement in the system has actually increased over the past 10 years.