Do I need to decare an accident my husband had in his car, on my policy?

He had an accident, his fault, in his car. I am a named driver on that policy. I am currently renewing my own policy on my car to accommodate our daughter, and he is a named driver on my policy. Do I need to declare to my insurers that a named driver on my policy, had an accident in his own car, with his own policy.

Many thanks in advance for any help

Kate