Dan,
I was lead to believe (a few years back) that a CPLH could be obtained with a similar colour restriction to the PPLH but I cannot comment on the availability of work with a resticted ticket.
However may I just remind you that you may have a second chance to avoid being classified as colour blind. The usual medical relies on the coloured dot pictures (which I failed) but if you go to some of the bigger medical test places (eg Gatwick) then you can take a test based on coloured lanterns. The eye can interpet lanterns quite differently to paint dots and hence you may be able to pass this test. I did not pass but I did do much better.
Good luck
TB