As we want to protect as many people as possible from the dangers of second-hand smoke, we extended the smoke-free requirements to cover more vehicles.
Rydym eisiau amddiffyn cynifer o bobl ag y bo modd rhag peryglon mwg ail law, felly, rydym wedi ymestyn y gofynion di-fwg fel eu bod yn berthnasol i fwy o gerbydau.