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GLA
Greater London Authority
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The Greater London Authority (GLA), colloquially known by the metonym "City Hall", is the devolved regional governance body of Greater London, England. It consists of two political branches: the executive Mayoralty and the 25-member London Assembly, which serves as a means of checks and balances on the former. It is a strategic regional authority, with powers over transport, policing, economic development, and fire and emergency planning. Three functional bodies—Transport for London, the Mayor's Office for Policing and Crime, and the London Fire Commissioner—are responsible for delivery of services in these areas.