Free Traffic Legal Advice

Hi everyone,
​I'm hoping to get some advice on how to correctly fill out my SJP online response. I've been hit with a dual charge (Speeding and S172 Failure to Furnish) because of a missing letter.
​Here is the timeline of what happened:
​06/10/2025: Underlying speeding offence (35mph in a 30mph zone in Leeds).
​The original NIP went to my wife. She filled it out and returned it, naming me as the driver.
​I then waited for my own NIP/S172 request, but it genuinely never arrived in the post. Police obviously didn't get a reply from me.
​10/03/2026: SJP Notice issued to me with both charges.
​The Charges on the SJP:
​Offence 1: S172 (Fail to give information relating to the identification of the driver) - Offence date 04/12/2025.
​Offence 2: Speeding (35 in a 30) - Offence date 06/10/2025.
​My Goal:
I was the driver, and I am completely willing to accept the 3 points and fine for the 35 in a 30. However, I want to avoid the 6 points for the S172, as I honestly never received the letter.
​I've been reading up and understand that doing a "split plea" online (ticking Guilty for Speeding and Not Guilty for S172) is a trap that could result in me getting convicted of both and receiving 9 points. I want to do the standard "plea bargain" at court (offer to plead Guilty to the speeding if the prosecutor drops the S172).
​My Questions:
​To execute this plea deal at court, exactly how should I respond to the SJP online right now? Do I plead "Not Guilty" to BOTH offences to force a court hearing?
​Is there a specific box I need to tick or a statement I should include in the mitigation/comments box online, or do I just leave it blank and wait for the court date?
​Thanks in advance for your help!