Fair play to this chap…took the system on and won…! 
Happy days 
cnet.com/news/engineer-uses- … -and-wins/
Read for your own Defence
I received a NIP for alleged speeding 14 months ago. I pointed out that the signs were not legal and that was the last i heard of it. I also managed to get the speed camera van stopped from attending the site because the signs are not legal. The operators of these cameras are supposed to check for these things each time they arrive at site but cannot be bothered to do so!