Seems harsh to me, but if he did contest it and went to court that's the risk you take.
Had a pro laser set up this morning, was a 40mph zone going into a 30. We only concerned ourselves with the 40 part though.
Tickets were given out to anything 54 or above, seemed fair to me. Highest we had was 59.
We were standing with the laser clearly visible for a good distance along the road, no hidey go seekey cos to me thats just plain unfair, just two blokes in High Vis jackets and still people did not see us