A lad on my selection was colourblind, he passed ADSC but had to change his job choices. I don't think theres a great deal of jobs that are open to people who are colourblind, but there is a few. Your best off going to your careers office and speaking to a recruiter, they'll be able to tell you one way or another.
Mattric your a cnut! Your best bet is going to the afco. I was in the RA t.a for 3 years, which I shouldn't have been with my red green colourblindness, but can't see how it effected my role at all but thems the rules mate!
You can all fuk off before talking about charge bags!
I know of one Military Railwayman who completed a German mainline driving course with no problems and was tripped up on a routine eye test later. (Posted out, loss of A trade, loss of A trade pay, possible loss of career etc).
It was all to do with speed, braking distance, reactions to signals, risk factors and passengers number etc.
For example mainline train at 120 KPH, 1000 metres braking distance or less, 100's of passengers, passing Red Signal at Danger (SPAD), possible accident.
It would be helpful if any serving RLC Railway Operators can confirm the current eye sight regs, but I believe the eye sight regs are the same as the major railway companies for loco drivers here in the UK.
When you do the medical and your results are entered onto the system it will automatically 'weed' out the jobs you cant do and hey presto..whats left you can do!! I am colourblind and it hasn't hindered me in anyway what so ever...I just wondered for ages why we had red landrovers!!