Jan,
It is strange that your current insurer, Zurich, will not provide
insurance for your 17 year old son. You must be getting a good deal with Zurich to be with them in the first place so it's not going to be a good move to change insurance company now although there are a couple of insurers who will
insure drivers with provisional licence.
If you want to help you son by giving him some private lessons, then you can get short term learner insurance for that purpose. There's only one company which provides this at the moment and it is listed below:
Collingwood Learner Driver InsuranceI hope this solution suits your needs but if it doesn't, then let me know and I'll get some alternatives for you.
