In replying to the NIP I have admitted the offence as I am the only driver of the car. I have now received a offer of a fixed penalty fine or a court hearing.
I am the registered keeper of the car.
I had put in for a change of address earlier in the week of the offence (29 April). I remember this date specifically because I re-taxed my car on the same day. Looking at my V5 document for the car, it seems the new document was generated on the 20th of May.
I understand there will be a delay due to changing the address, however 104 days from the date of the offence until receiving the NIP seems excessive.