My diesel car doesn't have a DPF, why has it failed the new MoT emission rules?

My Skoda Octavia 1.9 TDI has failed its MoT due to excessively high smoke. It was registered on 3 July 2008 and the MoT tester says it has failed the new rules that were introduced on 20 May 2018. I’ve...

Will the new MoT changes affect my diesel car?

I have a 2008 Volkswagen Golf 2.0 TDI. It is not fitted with a Diesel Particulate Filter (DPF) as standard so how will the May 2018 MoT changes affect this type of car?