Found on the CAAs website the other day -
Project Title - Advantages of normal colour vision in pilots visual tasks.
Objectives - To establish whether normal colour vision has any advantages in visual tasks that involve suprathreshold (?) stimuli defined by colour luminance contrast.
Background - ...It is therefore of interest to establish whether normal colour vision has any advantages in visual tasks that are typical of those involved in flying aircraft. The results will be used in future JAA discussions.
I can't remember the URL but at least this shows that they are thinking about things. I might just give the guy a ring and volunteer to be a subject....
The fight goes on...never lose hope!