The Insurance Paradox (The Most Expensive Myth) Here is the advice you usually hear: "Don't claim on insurance; your premiums will go up."
The MOT divides the screen into two zones. Zone B is the outer edges. Zone A is the 290mm vertical strip centered on the steering wheel. But here is the nuance that gets people fined:
If you search online, most forums give you a binary answer: "Yes, it’s illegal," or "No, only if it’s in the wrong place." But the reality of UK traffic law is far more nuanced. It is not the crack itself that is illegal; it is the condition of the vehicle relative to the standards of safety.
The safest legal advice is binary:
Fix the chip the day it happens. It costs the same as a tank of petrol. A fine, three points, and a potential insurance void costs a year of your life.
If a crack is in Zone A but is only 10mm long (the size of a fingernail), it passes. The moment it hits 40mm, it is illegal to drive on a public road. However, if that same 10mm crack is directly in front of your face, causing a prism effect (splitting light into rainbows) that distorts the view of a traffic light? A traffic officer can still fine you under Construction and Use, even if it passes the MOT length test. Beyond the legal text, there is a physics problem. A windscreen is not just a plastic-coated window. In a modern car, the windscreen accounts for up to 30% of the vehicle’s structural rigidity . It is a crucial component of the crumple zone and ensures the roof doesn't collapse in a rollover.
Your first thought isn’t about aerodynamics or aesthetics. It’s legal: Can I get points for this? Do I need to pull over right now?