Thought I'd put this in here as it's FHD related (though not Wessex) in that Portsmouth are consulting on a CAZ
https://www.route-one.net/news/portsmouth-caz-consultation-opens-on-15-july/
Now what's the likelihood that the public (and so the council) will go for euro VI for buses, coaches, large goods vehicles but perhaps the car driver will be spared as (....insert usual stuff about a bus emitting more than a car in absolute terms whilst ignoring the per capita issue)?
I guess that First and Stagecoach will actually be reasonably ok given the modernity of the fleets generally with e200mmc, e400 (SC) and Streetlites (FHD). The Omnicities at Hoeford will need sorting but they're probably due to go before then anyway?