Apple confirmed that they were rebuilding their maps apps from the ground up and said that initially only certain parts of the U.S would see any significant changes.

We can confirm today that Apple maps vans have been spotted on U.K. roads so hopefully by the time iOS 12 launches we should see a better maps experience here in the U.K.

Currently Apple maps in the U.K. are full of inconsistencies and reporting of map issues have gone unchanged. With Apple controlling their own maps we should see inconsistencies and errors fixed much faster.