there a few that crossover into this,rendering abs inoperative for instance(which this can do)aint allowed unless the system is removed which also aint allowed after a specific date,rendering a rear load valve inoperative(which again this could do)is another,we were told to accept mods like this on race/rally cars with specific requirements for them to meet to be accepted as such,road cars we were told were a no no,your best option is to contact dvsa to get a specific ruling but if its against iva i doubt its acceptable on a road car.why would you need it on any modern vehicle when abs/stability controls etc do all this for you anyway?the only purpose I can see on a road car is to lock wheels for burn outs:shock: