If you have made any modifications on your car that may have raised its value, make sure you inform the car insurance comapany uk company as it may increase your premiums or worse, not be insured.
If you have expensive in car entertainment make sure your car insurance policy provides enough cover to meet the cost of replacing it and it has been declared on the application form, if it is not standard equipmenty in that car.
Always remember to lock your car, if it's stolen while unlocked your car insurance company may invariably refuse your claim. Do not forget this rule may also apply to your belongings too.