Oh - how could I forget - here's the list of references that CAsA avmed provided with the letter.
All 262 of them!
About 261 of these make the ASSUMPTION that defective colour vision is unsafe in aviation and discuss the testing of colour vision.
Nice of CAsA to include reference 41 by Clark, BAJ, Gordon, GE.
"Hazards of Colour Coding in Visual Approach Slope Indicators". Aeronautical Research Laboratories, Defence Science and Technology Organisation.
This paper predicted the Tallahasee accident years before it happened.
The captain was not CVD and he was monitoring the black-hole PAPI equipped approach.
The size of the list is proof that CAsA intend to use 'quantity rather than quality' to fight this case and beat up the little guy until he cannot afford to continue the case.
http://cvdpa.com/images/pdf/CVD%20References.pdf