The Basics
The first principal is that to be legal abroad, you must be legal at home. You should not let your MoT expire while abroad, or SORN your vehicle. There are the generic standards – things you need to do pretty much everywhere. You need to take your driving licence, your passport and your V5C registration document showing you are the vehicle keeper or a VE103. A VE103 is a form showing you have permission to take a vehicle you lease, or do not own, abroad. If you have an old non-photo licence then some EU countries will require you to carry an International Driving Permit, so either update your licence or get an IDP from the Post Office.