These two were merged in 1965 to form the London Borough of Hammersmith.

Hackney was expanded to form the London Borough of Hackney.

These boroughs were merged in 1965 to form the modern London Borough of Islington.

In 1965 the area of the constituency was joined to other districts to form the London Borough of Barnet in Greater London.

In 1965 East Ham was joined with other districts to form the London Borough of Newham in Greater London.

In 1965 the borough of Wembley joined forces with Willesden to form the London Borough of Brent.

These two were merged with Shoreditch in 1965 to form the London Borough of Hackney.

These population figures reflect the area that now forms the London Borough of Tower Hamlets only:

Its former area was combined with that of other districts to form the present-day London Borough of Barnet.

In 1965 the former area of the borough was combined with that of two others to form the London Borough of Camden.