Fuckin' love ULEZ. I know it's a largely unpopular opinion outside of this comm, but I like how peaceful it is, how quiet it is, and how chill it is. It's nice driving a low emissions vehicle through it on the rare occasions I have access to it.
Fuckin' love the new 20 zones being rolled out too. The only folk I've heard complain about it are those who generally can't plan anything beyond a pissup in a brewery. It's more relaxing to drive at 20, it feels safer going past pedestrians and cyclists, and it feels less hostile to other road users.
By extension, I love the trend towards paving over city centre roads and only letting mass transit vehicles or cyclists along them with pedestrians. It's much more fun to walk down - or from my niche view - run down iconic city centre locations without being irritating to other pedestrians on pavements or at risk of being struck by a vehicle on the side of the road.
Yes, 20mph zones on a nationwide basis are a fairly new occurrence here. Wales rolled them out a year or two ago, and they're being rolled out in Scotland now.