I too was told that I was green deficient 10 years ago.
I had to instruct for years as I could only get an old class two (JAR class1 restricted) medical
This summer I went to Switzerland and did their colour vision test and passed!!!
I took the letter to Gatwick and dispite failing their Lantern and plates years ago, they issued me with a completly unrestricted Class 1 medical
GOD BLESS JAR!!!!!