towing a car trailer and a car with another car like the peugeot is illegal, your way over gross train weight, and its totally unsafe as you dont have the braking force or the weight to stop yourself and the car on the trailer.

the police dont really give a toss, or know the law regarding construction and use, its the ministry who WILL rape you, a friend of mine 150kgs over the GTW, £2k fine and had to have the lot recovered away, not allowed to drive it.
If that DVLA have told you tat you can tow a trailer if you passed after 1997, then why did they introduce a trailer test and for whom ?

Having spent many year on commercials having to know about train weights and MAM's was critical, hence having a LGV licence resolved any issues for me.