What items do I have to keep in my car by law?

Can you tell me what items I have to keep in my car by law please? There two things I can think of which may be required, a warning triangle and two yellow vests but I am not sure.

Does having an airbag light on invalidate my insurance?

Will an airbag fauly warning light on my dashboard invalidate my insurance if stopped by the police in England?

Will my daughter be charged for leaving the scene of an accident?

My daughter was driving home at 3am on Sunday morning in dark rainy conditions, she skidded, lost control and hit the kerb and a traffic light (which was damaged) She left the car in a safe place nearby...

Can sat nav systems be updated to include width limits?

I live in a small village in Bedfordshire. On the principal route through this village is a width restriction of 6ft 6ins. We are plagued by lorries regularly ignoring this limit indeed some are directed...