Look at what Tim Roberts has to say in the last paragrapth 
Typical scamera pratnership statement.
Its easy enough to verify the speed of the truck by reference to the white markings painted on the road.
The truck will have travelled 1 metre for each 4.5 mph at which it was travelling. So if it was travelling at 20mph, it will have covered around 4.5 metres, and if it was travelling at 40mph it will have covered around 9 metres inbetween the two photographs.
Vince
Amazing isnt it…it will be interesting to see whether the tacho is in fact accepted as evidence…we all know that you cannot be prosecuted on tacho evidence alone in the u.k. but there are a few who have been prosecuted in europe…especially by the french…but over there it doesnt affect your licence…
just makes you wonder how many have picked up fines and points from this and other dodgy cameras?