When many Americans worry about a crisis in the United Kingdom, they think of the deaths of Sybil and Matthew in Downton Abbey. While this fictional situation might be important to the show's followers, Americans should be more concerned about Britain's potential exit from the European Union.

Despite a challenging fiscal situation, the current government has committed over a billion dollars of new funding to an office set up to promote cyber security. Like our American counterparts, we recognise that strong policy in this area is both a national security priority.

Campaigners have been left baffled and angry by a long-awaited review of extradition arrangements which found the current treaty between the US and th...