Free Traffic Legal Advice

Can somebody PLEASE help or at least offer advice. I have been sent a letter by West Yorkshire Police stating that I had done 36mph in a 30mph zone, which I am  in agreement with and am OK to accept the points. However, they have informed me that I am to be charged with another offence, namely failing to give information regarding the identification of the driver. Meaning, they have insisted that a letter was sent out to me on 04/03/24 which I never received. Although I am 74 years of age the only thing that is still intact is my memory. I have been informed that if I plead not guilty to the latter I will have to go to court to plead my case which will undoubtedly involve paying court costs etc. As I have stated I am now 74 with no income to speak of and am panicking to say the least. I have only one week left to send this paperwork back to HMTCS. I would just like to add that if I had have received any correspondence regarding this matter before 11/7/24, then I would have supplied the details of my identification without a doubt as I would have no reason not to.

HELP!