England and Wales mayoral referendums

As of October 2016, there have been 53 referendums on the question of changing executive arrangements to a model with a directly elected mayor. Of these, 16 have resulted in the establishment of a new mayoralty and 37 have been rejected by voters. Referendums are triggered by council resolution, local petition or central government intervention.

"Yes" majority shown in green, "No" majority shown in red.

There have been six referendums on the question of removing the post of elected mayor. Three mayoral posts have been disestablished following a vote and three retained.

"Retain" majority shown in green, "Remove" majority shown in red.

...
Wikipedia