Re: Justice for the UK?
" It will be a good idea if the muppets from the Met start checking and enforcing it."
It doesn't need the Met to do it. The DVLA enforcement arm can just as easily start checking for missing cats/DPF and impounding vehicles - it's a MOT failure and MOT is the _minimum_ standard for maintenance a vehicle must be kept at in order to be allowed on the road.
The interesting thing is that it's possible to pick up NOX emissions via a suitable roadside camera and then flag down offending vehicles 100-200 metres down the road. If the claim about PHVs is accurate then "drive over this ramp" will catch them pretty easily.