As the holder of an electrical installation licence, here's what you need to do:
Appoint a licensed electrical worker (LEW) of the appropriate class to take charge of your electrical installation.
Ensure that your electrical installation is properly maintained as recommended by your appointed LEW.
Inform your appointed LEW whenever you plan to make modifications to your electrical installation.
Ensure that any electrical work is carried out only by a licensed electrical worker (LEW).
Keep a copy of the updated single-line drawings at your electrical installation.
Ensure that your electrical installation is inspected by your appointed LEW at the required frequency and keep a copy of the inspection report.
Renew your electrical installation licence before it expires.