I had a crash in my wife's car - do I need to tell my own insurer or just hers?

I was driving my wife's car and we had a car crash. Both of us are covered fully comprehensive. Presumably, I'll need to inform my own insurance. The incident is being dealt with by my wife's insurance....

Can I drive a friend's vehicle if it's covered by a trade insurance policy?

Can I drive a friend's vehicle if it's covered by a trade insurance policy? I'm insured fully comprehensive on my own vehicle.

My car is only worth £2500, should I still insure it fully comprehensive?

My car is only worth £2500, should I still insure it fully comprehensive?

Fully comprehensive vs third party cover

I own an old car, the value of which is approaching write off status if it should be involved in even a minor accident. Problem is, I really love it, and everything is rust free and works as it should....