They're going to be rolled out in every major town/city soon, I was reading about Portsmouth CAZ too, 39 ANPR cameras being erected now for the Autumn start.
After 13th July the powers that be in the EU will be making petrol/diesel much more expensive, It's all linked to Paris accord members
"A revision of the EU’s energy taxation directive is also expected to focus on taxing fossil fuels more heavily, including petroleum products."
https://www.euractiv.com/section/ene...e-for-big-oil/