Basically, you will need to have your licence re-issued as a lifetime EASA Part-FCL PPL(A) with SEP Class Rating.
The good news is that you won't need to sit any theoretical knowledge examinations!
You'll simply need to do the following:
1. Sort out a Medical Certificate. The EASA Part-Med Class II is slightly easier than the JAR-FCL Class II was and your AME will be able to sort you out.
2. Pop down to your local flying club and discuss how much refresher training you might need before you can take a renewal check flight.
3. Do whatever refresher flying you've mutually decided upon.
4. Fly an SEP renewal proficiency check with an Examiner. This isn't the same as the original PPL Skill Test, it's about 1-1½ hours of a short nav section, stalls, steep turns, PFL, and circuits. Nothing you won't have done before.
5. Fill out copious forms and pay the CAA for the issue of your new licence.
If you plan on adding IMC privileges to your licence, it is possible that you may not be able to do so after Apr 2014 - so don't delay if that's an ambition.
Lastly, you may find a more receptive audience if you post such queries as yours on the 'Flying Instructors and Examiners' forum in future. Regrettably, you have had to contend with amatuer comedians on this forum, whereas FIs understand that there's no such thing as a silly question, only a silly answer.
If you join AOPA or LAA, you can also ask those organisations for advice.
Good luck and I hope you're back in the air again soon!