To revalidate your ME IR you will have to pass an IR Proficiency check in an aeroplane or an approved FNPTII with a JAA IRE. That willl include your SE IR privileges. You can include the MEP Class rating test with the IR but that has to be done in an aeroplane.
If you wish to revalidate the SEP Class rating you either require 12 hours experience or you will have to do a class rating proficiency check in a SEP aeroplane.