The CAA v FAA thing is a good argument I think. The FAA will test practically if the screening test is failed. IF you pass their practical test, they give you a SODA (Statement of Demonstrated Ability), now we know there are thousands of male US pilots flying all around the world daily. By stats 8% of these should be CVD, so US CVD pilots are logging probably thousands of hours a week without colour vision related accedents. I think this shows the FAA HAVE complied with the Air Navigation Order.
Now consider this. If you fail tests at Gatwick and then ask them to take into consideration your FAA SODA and they say no - then they are surley either admiting that they are breaking the Air Navigation Order or that the FAA is - I'm sure that is not a good situation for them to be in.
For all those who have looked at legal action - has anyone taken advice on this? or has anyone actually asked the CAA to take an FAA SODA into consideration?
Hope that someone can give some interesting feedback about this.