Reference

The London Government Act of 1963 led to significant changes in the boroughs of London. According to the search results, several boroughs were abolished or transferred. The Act established new administrative areas known as London boroughs, which replaced the previous system of local government. Some of the boroughs that were abolished included the Municipal Borough of Walthamstow, the Metropolitan Borough of Wandsworth, the Municipal Borough of Wanstead and Woodford, and the Municipal Borough of Wembley, among others. Additionally, the Act led to the transfer of areas from the County of Surrey to Greater London boroughs. The image provided in the search results shows a map of London boroughs as per the London Government Act 1963, illustrating the new configuration of boroughs post the Act's implementation. For a comprehensive list of all boroughs affected, one can refer to the Wikipedia category dedicated to districts abolished by the Act.