20mph limit sees Welsh operator ditch Euro 6

Vehicles sold because of concerns over particulate traps A Phil Anslow bus in Cwmbran
 A bus operator is selling two of its Euro 6 buses because of concerns over the vehicles’ particulate traps when 20mph becomes the default speed limit on restricted roads in Wales. However, an experienced bus engineer told Passenger Transport there was no need for Welsh operators to sell Euro 6 buses because there were other ways to manage the issue.
From September 17 all roads with street light