If a vehicle has been found to have been involved in the commission of trespassing, the owner of the vehicle is liable for the offence and resulting fine. This applies if the operator of the vehicle cannot be identified. A police officer pointing out this fact may not have any difficulty in persuading the registered owner of the vehicle to identify the person who borrowed it. Therefore if you have borrowed your father's vehicle and commit trespass with it, if you are caught then you will face the resulting trespass charge. If you are not identified but the vehicle is, then your father is liable for the charge.