I failed the Ishihara test for my Class 1 at Gatwick having previously passed it on at least three previous occasions, my original Class 2 medical, my HGV medical, and a medical for a job.
I then took the Colour Assessment and Diagnostic test (CAD) and passed that fairly easily. I can't remember the exact results now but it was good enough for a Class 1 but not good enough for me to be an Air Traffic Controller.
Last edited by Phoenix09; 17th Jun 2012 at 07:55.