The Association of London Government (ALG) came out of a merger between the London Boroughs Association and the Association of London Authorities in 1995. The ALA consisted of many, mainly Labour, councils which had left the LBA in the 1980s.
To coincide with the creation of the Greater London Authority, the ALG merged with the London Boroughs Grants Committee, the Greater London Employers Association, the London Housing Unit and the Transport Committee for London on 1 April 2000.
In October 2006 it changed its name from the Association of London Government to London Councils in order to avoid confusion with the Greater London Authority (GLA) and the Local Government Association (LGA).
More information on the Wikipedia page [1]. The website is [2].