Hmmmmm
So after ploughing through the 36 page document I think I can continue using a CAA ATPL(A) on EASA aircraft until 7th April 2014.
I could convert it to a JAR license if I want to, but still have to convert it to EASA by that date. Paying twice of course.
If I convert it after 1st July this year I can get an EASA license.
As it expires in November this year, if I apply to renew nearer that date, I'll get an EASA license for life.
I think.
Eff oh.
Good luck with the document.