I was talking with some of the workers from Britain the other day and it seemed that many of them had been caught out speeding in zones that they were not aware of. And fined for it too!
In Denmark, the speed limits are not always posted on obvious signs. In smaller towns and villages, the speed limit will be 50km and nowhere is there a sign that says 50km. You will see a cityscape sign indicating the speed limit.
Please be sure to know this when driving in Denmark. The police and speed cameras are fewer than in Britain but not as obvious. No warning signs (speed cameras ahead), just a flashing light when you are caught on camera by their traffic vans.
If you want to learn more, so you do not get a huge fine (they are pretty steep here), you can read more about it at http://www.fyidenmark.com/driving_in_Denmark.html