Many car insurance policies give you cover for driving in Europe for up to 30 days, just remember to speak with your insurer before you leave to confirm this.
The standard cover for driving in Europe provided by many insurers is often the most basic third party cover, so make sure to check with your provider first to see what level of cover you have, and to make sure they know when you're going to be heading there so they can issue your green card.
If you have a car that's expensive to repair you may want to consider upping your level of cover from the standard third party. Your insurer may charge you for this but without additional cover, if you're involved in an accident that's your fault or where the fault is unknown, you won't be able to make a claim for repairs needed to your car.
Some insurers offer European car insurance as an optional extra when taking out a policy. When it comes to getting a quote through Confused.com, once you have your list of prices, click on the 'About Provider' button next to each provider to see whether they include EU cover or a green card.
A green card is issued to you by your insurer for use whilst driving abroad. It's a motor insurance certificate valid in Europe that can help making a claim or exchanging details with another driver or the local police whilst abroad, easier. Make sure to keep it safe with your other travel documents as it proves your car is insured.