This happened to a friend of mine.
All the FAA tickets, JAA ATPL writtens as well as the Skills Test. But delayed in sending the paperwork into the CAA for issue due to personal circs. Submission was made three years and two weeks after the writtens were completed.
CAA rejected the whole lot with resits for everything required.
Doesn't sound very hopeful, but don't let that put you off trying!
Good luck.