The quantity of particulates and NO2 is not the issue here. It is a good aim to reduce pollution regardless, anyway, and transport is a necessity. What needs to be done is to avoid the sadistic temptation not to try to make decent folk feel guilty for trying to do the right thing, nor to use the issue as an excuse to persecute those with diesels and demand more of their money simply because one has the power to abuse them. The correct path is to continue to encourage manufacturers, designers, inventors, to improve what we use today into something better tomorrow, and then let natural obsolesce do the rest.
In the meantime those worried about being in a high pollution area already have the answer. They have an incentive to move out to a cleaner area until things improve naturally.
Meanwhile the programme suggested that since the push to get people to use diesel for preference was to improve a CO2 problem, going back to petrol will exasperate that; so no one at this time seems to have an ideal solution.
Pointing out where petrol scores over diesel doesn't help matters. It's merely gloating, and likely to start slanging matches as someone else starts pointing out where the diesel scores.