Intresting thread as I too am colour deficient 'unsafe' when it came to the CAA and RAF.
Anyway, I knew I was colour blind before I went into the CAA but didnt tell them as I had heard they only give you those dreaded cards to fail you. So, and this may help some people, if you fail the cards they then test you on the Holmes Wright and in the case of the RAF (at the time) the giles archer too.
Further to this as I was at the RAF station for a CAA medical back in the days when Cranwell were earning a bit of extra cash for themselves, the head of the medical division wrote me a kind letter to the CAA stipulating that although I failed the tests for the RAF class 1, I should be deemed to fly safely in the GA world. That letter seems to work wonders with all the CAA medical examiners but obviously not the Class 1!
Um, not sure if any of that was any use really.
