To be forewarned is to be forearmed.
https://www.whatcar.com/news/mot-test-changes-in-2018/From 20 May 2018 the MOT test is becoming stricter in a number of areas. The changes are being brought in to adhere to a European Union directive called the EU Roadworthiness Package.
There will be tighter scrutiny of diesel cars’ particulate filters and faults on cars will be classed as Minor, Major or Dangerous.
Minor faults are comparable to the current ‘advisory’ notices written on test certificates by MOT testers for items that aren’t bad enough for the car to fail its test, but will need to be fixed at some point.
Faults classed as Major will require the car to be fixed and retested. And those categorised as Dangerous will make it illegal for the car to be driven on public roads as well as automatic failure of the MOT