MOT test changes in 2018, what are they and how could they affect you? – What Car?

MOT test changes in 2018, what are they and how could they affect you?
What Car?
If you're buying a diesel-engined car check if it has a DPF – if it does ask if it's had any problems and check the dash for an orange warning light that may look like an exhaust. If this is illuminated it means the DPF is becoming blocked – don't buy