My insurer would not insure my son to learn to drive in my car - do I need to state that he was declined insurance?

My insurer would not insure my son to learn to drive in my car, a Dacia Duster. Do I need to state that he has declined insurance when I try other learner insurance companies?

Why are insurers declining to give us a quote after a previous claim?

We have insurance on previous car where I was a primary driver/policy holder and my partner was a named driver. She had a minor accident in Sep 2017 for which we are in dispute and just yesterday the claims...