Joby, I understand what you're saying regarding 4x4's.
However Fenster does have a point, as not all vehicles have a seperate ladder chassis, and they have a monocoque design. The chassis is integral with the bodyshell.
As modern cars are designed with crash impact crumple zones predominatly at the front end, to absorb impact speed and thus reduce personal injury, one does have to be very carefull to ensure that any front tow bar fitment does not compromise the integrity of the original crash test results. The manufacturer being quoted here clearly informs potential customers that in the eyes of the law, as the push bars are not permitted on the highway, they are not CE marked and as such are only made to BSI standards for manufacture.
Once again I'll reiterate, that insurance companies will look very carefully at any possible additional fitment and quite frankly, use such fitments as an escape from obligation to cover an accident.
I'm not against push bars, and have used them in the past. In fat, Lutz has come up with a possible way around the fitment issue by suggesting that car owners use the existing tow eye screw in location. The only stumbling block being that the primary design of the tow eye location is to provide latteral tow strength, and as such a nose weight of 75kgs has not been calculated into the original design process. But using this method would eleviate any additional bracketry being left permanently fixed to the car, thus giving no reason for an insurance company to load your policy.
Steve L.