The KDDI system, is able to detect more complex behaviour by using analytical software - held on a server back at base - to match patterns of common movements.
As his family lived close to Greenham Common in Berkshire - a former air-force base where nuclear-armed US planes were stationed in the 1980s - Mr Cameron said he had also been aware of the arguments about nuclear weapons and Britain's defence.
While this may have worked sufficiently through the great credit crisis of 2008-2009, this common currency and shared economic base is experiencing strains coping with fiscal problems of one (or now many) of its underlying constituent countries.
At the heart of the act is assistance for small businesses (SMEs), such as the the possibility of a common tax base for SMEs that operate on a cross-border basis.