Typically ill-informed decision making. "CO2 is killing the planet we must reduce CO2", "NO2 is killing the planet , we must reduce NO2" are they dyslexic or just stupid?
Not only are they trying to address the issue by targeting the third highest contributor - lets just ignore the electricity generating power stations and old heating equipment and go for an easy target, but they are also only focussing on one particular emissions gas, what about the HC emissions, and CO2 (oh, sorry that was last week's new) and particulates, and the other NOx, etc....
And as for alternatives for HT... there is a reason there aren't any non-diesel trucks out there.
Looks and sounds very much like a bit of Tory-graph spin to have a go at the previous Labour Government and their transport policies.