I guess that the OP could write to the Parking Operator and ask the following question;
I am the vehicle keeper and I have received your PCN.
This car is a family vehicle.
Your PCN asks me to nominate a driver - in this instance should I provide the details of the driver who entered the car park on the first occasion or should I provide the details of the driver on the second occasion?
A lot of people use the car park at the retail park as its the only place where you can park for free for 2 hours and go into Ilford, and this is an instance where did not shop at either the Lidl or the Farm foods at the retail park.
Unfortunately it was the same driver. An item was purchased at a shop in Ilford, was found to be defective when got home, and went back to Ilford to get it resolved instead of waiting until the next day.
We are well aware of the 2hrs free at this retail park, but were not aware of the no return with 1 hr condition.
I thought about saying it was two different drivers but if they have better resolution pics of the vehicle entering you can see its the same person, so dont want to risk using that defence.