The law is so unclear I also know i can not tow over 750kg other than that im so confused i now tow nothing. Law is a joke pre 97 people can drive a lorry up to 12t and post 97 we can't do anything other than a few bit of cotton wool. To be fair towing is one of the hradest things a car driver can do as there is twice as many variables to go wrong, I drive regulary behind proplw who do 40 flat out yet they can drive a lorry which is a worry