That's not really the issue kietotheworld - of course I'd love to drive at that speed (assuming I had a car that were capable, heh). But obviously the issue here is that any civilian caught doing that speed would face a world of legal pain. Because of his job and apparent excuses such as "the road was deserted and it was good driving conditions", it's ok for this guy to do it.
If this country is going to be anal about speed laws - it could at least practice being consistent as well. Then the rest of us wouldn't feel we were being screwed over while those in charge can do as they please.
aldo_14 - point taken, to be honest I don't think you could do over a hundred on most Scottish roads anyway (certainly not safely). But if that's not feasable then any large expanse of land such as an airfield would be suitable. Such testing just shouldn't be done on an open and public road.