The MOT test for diesel cars will be tightened up from February 2014 and any car that is missing a diesel particulate filter (DPF) once fitted as standard will fail. Currently a car is only tested on ...

Government urged to crack down on rogue practice of garages removing compulsory diesel particulate filters from vehicles More than a thousand diesel cars have been caught without an essential ...

It's illegal, but the EC law is not yet enforced as part of the UK MoT. You have to disclosed the modifications to your insurer who will increase your premium as a result. At any time in the future ...