I would check this one,I had a car for 6 months and told owner i was going to park it at his house with no tax on it so i phoned my local trafic police and asked who is responsible for car and he told me its the owner and said if i transport it to the guys house on a truck and leave it there thats ok,may be worth a phone call to your local police (but make sure you get the officers name).I also was driving a cutomers car that i didnt notice the road tax had expired and got stopped by police and customer got fined.