Classic landrover mag No 57

Theres an article from a yank who buys a 109 sw off ebay in uk then flys him and his family over jumps into it and heads of to tour europe...great stuff good pics...uthen imports it into usa...how does he manage to drive said vehicle in uk and europe with californian plates on it? as is shown in pics...am i missing something...probably...i rely on being informed to what it is...lol