Hi TedstrikerB777,
The medical center at Crawley only do Ishihara Plates and the CAD test. For the other types of colour vision testing, you have to do the at the City University London in Finsbury, London.
A new web-based colour vision test | City University London
They start your assessment with the Ishihara Plates, then do the American version, then onto the Lantern and the rest of the older style tests then ending with the CAD. It's a lot cheaper as they only ask for a £60.00 fee whereas the CAA charge £125.00. You get a full set of certificates detailing your scores for each test that the CAA accept. If you pass any of the test mentioned on the CAA website, then you'll get an unrestricted medical. If you take these certificates with you to the Middle East and let the AMEs out there see, I can't see why they'd put you through further testing?
Best of luck!
