If he's serious, he'll need to do some planning - stops for fuel, food, and rest are essential. He'll also need to stock up on spares and make sure the car is in good nick. There'll be additional travel costs too - a ferry over to Spain and then a crossing from France to the UK. Once the car is back, he'll need to inform HMRC about it, pay any VAT or duty that they tell him to, make sure the car meets UK safety regulations, then tax, MoT and insure it. You can read more about importing a car here: classics.honestjohn.co.uk/insurance/articles/how-t.../