Thanks Steve,

 

A point of interest also is the paucity of knowledge among the populace in general about the simple basics of GPS etc. I still come across considerable numbers of people who believe their satnavs are actually being "tracked" by the satellites! This phenomenon is, of course, often accompanied by even stranger explanations of how speed camera systems work. It's possible, therefore, that to expect politicians to understand such things may be "a bridge too far"!