I presently have two cars because I've bought my new one and not yet sold my old one. They are both taxed and insured on separate policies with different providers, for me only to drive. A colleague who lives in another town has had his car stolen and I'm minded to lend him one of mine for a couple of weeks until his insurer pays up and he gets a replacement. Is the best solution for insurance for him to obtain short term insurance while making no change to my own existing policy? Are there pitfalls I (or he) should look out for?