The sale of new fossil-fuel engine vehicles, like diesel vans, is going to be banned from 2035 as part of the electric switchover. High-polluting vehicles might also be restricted in Clean Air Zones (CAZ) and Low Emission Zones (LEZ) across the UK, as more of them are introduced.
However, it is unlikely that diesel vans will be banned from the roads in entirety, even if they become increasingly regulated.