Until Oct 2006 you will just need to fly a renewal with any CRE/IRR in the form of a Licensing Proficiency Check / IR. After 5 years' lapse you would normally have to do an initial IR with a CAA Examiner. After 7 years you may have to take ground exams and do training. You may get a dispensation to avoid the CAA Examiner on the strength of holding the Zambian IR but you'll certainly need to ask the CAA.