If your aim to avoid revocation and retest then do not accept the Fixed Penalty offer.
Your options are threefold:
1. Plead “not guilty” and successfully defend the charge; or
2. Plead guilty and argue Special Reasons not to endorse penalty points; or
3. Plead guilty, request a court hearing, attend court and argue for a very short disqualification. Disqualification from driving would avoid revocation and retest.