I don’t know the full details yet, but its seems new EU laws suggest that any vehicle such a s avan or lorry, needs to have a Tacho for journeys over 100km. This is creating issues with the local breakdown recovery truck, who may want to tow a car back to its owners home.
Of course many of these services are 24hrs and work silly hours, so a spy in the cab, may not be that welcome.
I am yet to find out the real details of this new regulation, or even if it exists, I found this info off a forum. So if you do know about this, please commet.