After the Welsh Government announced in mid 2013 their intention to evaluate speed camera benefits Eric Bridgstock and I contacted them and in the Autumn each gave presentations to the same meeting.
The first file below is my letter to Ms. Hart asking for a meeting, the second is the Powerpoint presentation I gave at that meeting, demonstrating that benefits have been greatly exaggerated. Additional material will be added as time permits or copied on request.
See also http://www.fightbackwithfacts.com/false-claims-wales/ for the absurdly exagarrated claims of the Welsh Partnership in their Reports, that ignore both trend and regression to the mean. A formal complaint of misrepresentation is now in hand.