A decade ago when London chose its first directly elected mayor some feared it would become a shallow political beauty contest. But the idea has taken off. 16 authorities now elect or are about to elect their mayor. Ten more British cities are about to decide. This is Birmingham's so called Council House built with some grandeur in the 19th century to run Britain's second largest city. If voters say yes, they could scrap the traditional council here and choose an executive mayor. But one recent poll suggested the idea is unpopular and voters here remain divided. Some experts want to go further and give mayors control of local health and policing, though that remains highly controversial. Many democracies around the world already have directly or indirectly elected mayors and in mainland Europe it's common. So a "yes" vote in a large number of British cities could be followed by more. In a decade local government will have been transformed.