I know this is a bit old but have just gone through this in court.

My works van was caught speeding and by the time I got the NIP it was about 6 months old due to me not being the registered keeper.

I knew where I was on the day due to work log but that is it.

The van could be used by anyone in the depot I was at at the time but I never kept records of that.

They wrote to me stating I had to identify driver or go to court.

Pictures were rubbish so said I couldn't i.d.

Long story short........I went to court, they said how could I deny the charge of failing to provide driver details?

I gave them printouts of times I was on jobs, said I had asked everyone in the depot on the day and had shown photos to everyone.

They reluctantly dropped the charges.