Currently you are being asked to name the driver of the vehicle specified at the time, date and location specified.
The NIP does not alleged that you did anything, but that the driver of your car at the time, date and location specified did.
If you are certain that your vehicle was not at the location specified at the time and date specified, then your vehicle cannot have been involved in the alleged offence, and you are not the person keeping the vehicle - so your obligation under s. 172 RTA 1988 as "any other person" is to provide any information that is in your power to give and that might lead to the identification of the driver. That information would typically be that your vehicle was not at the location stated at the time and date stated, and would generally also include where your car was at the time and date in question.
It might be prudent to think long and hard about where your car would have been at the time in question, and, if it is possible that the time and date might simply be wrong, take long enough thinking long and hard that it would be too late for the police is serve an amended NIP within 14 days of the actual time/date.
N.B. Where you were at the material time is of minor relevance - it is where your car was that is relevant.