Polling shows support for the change.
Where implemented elsewhere support generally further increased after implementation.
That question is somewhat biased I might suggest. Had the question been do you support the introduction of a blanket 20mph speed limit in Wales we may have seen a different outcome. There are many many roads now at 20mph where cars do not mix with pedestrians.
As a point of interest RedfieldWilton is an agency run by a good friend of Lee Walters, the minister leading the campaign/policy. The same company that provided the data that showed overwhelming support before.
Unfortunately the evidence was based on the question: Would you like to see less accidents outside your house/in your location...? Not many people are likely to say no to that.... but it is a totally different question to: do you support the introduction of a blanket 20mph speed limit in Wales?