@Darren ********
90kmh is already above the speed limit. So if you "undertake", good luck with the photo shot. As you get fined for three things:
- not paying attention to the road signs
- speeding
- and undertaking ... and probably one or two more.
So: your driving license is instantly confiscated. Because they know: you do not mind the fine. Come back 6 month later to get it back.
And if one is in front of you at a speed that is unappropriated, you are supposed to honk the horn. And honk it 2 times, after lane change, in case you plan to undertake, and unlike normal overtaking: you undertake (relatively) slowly.