Thanks so far.
Basically, the job I'm interested in is Flight Ops as I know my colour blindness will preclude me from flying.
The AFCO told me to get an eyetest done with the Isihara and Homes-Wright lantern tests independently. The results are then sent to Cranwell and they would tell me whether I am up to Flight Ops eyesight standards. The AFCO told me that they can't do any more until I get my results back, and they couldn't find anything or anyone to advise on the specific eyesight requirements during my appointment with them.
I found a document online yesterday which had Flight Ops down as requiring CP2 colour standards, which I'm very sure I can't attain. At the moment, I'm trying to find out the standards required as it may save myself and the RAF the cost and hassle of eyetests and the Cranwell results.