That would tend to make the notice invalid as they haven't identified the right person. However, as the notice isn't strictly necessary, they could sort that if and when they raise a prosecution.
I sort of understand that, but I thought the notice was necessary, it says if you don't get the notice within fourteen fourteen days not counting the day of the offence then they can not carry on, if they have served the notice to the wrong person i.e the wrong date of birth, would they not have to send another one, which would be outwith the time period, you view on that
No, the Notice is simply to give intimation of what the charge will be, for example if they serve a notice for a section 3, they couldn't then prosecute a section 2 and if they serve a notice intimating section 2 then they couldn't charge section 1. As that is the purpose of the procedure, it, fair notice, any inaccuracies not relating to the charge can be remedied later when they prosecute.