As I understand it you dont have to fly with an examiner. To Keep your class rating valid you must fly at least 10 route sectors. ( route sectors are comprised of at least a take-off, climb and cruise of not less than 15 min followed by a landing as PIC) You will also have to fly a proficiency check with an instructor within the preceeding 3 months of expiry.
You would only have to fly with an examiner if the rating has expired. So you will not have to take a skills test again unless you let it expire.
Check here for full legislation:
<a href="http://www.jaa.nl/jar/ihs_data/frameset.html?../av_vault/48000/48700/48700.htm" target="_blank">JAA Class/Type rating</a>