Sorry to hear that, Blinkz. It's worth doing a search on the numerous threads in this forum relating to colour blindness / lantern tests, because I believe there are 2 other options (speaking from memory as I haven't done the search and colour vision isn't my problem) - Spectroscope (or is that the lantern?) or a test which involves ATC showing you lamps while you're alongside an approved assessor. May be total bu11$h1t, but check it out anyway.
PS I'm in Livingston - which side are you?