It was from the merger of the municipal borough of Nuneaton and the urban district of Bedworth (which included Bulkington).

It was created by a merger of the municipal borough of Rugby (which covered the town of Rugby) and the Rugby Rural District.

It was a merger of the borough of High Wycombe, Marlow Urban District and Wycombe Rural District.

It was formed on 1 April 1974 by the merger of the borough of Whitehaven, Ennerdale Rural District and Millom Rural District.

It was formed on 1 April 1974 by the merger of the borough of Aldershot and the Farnborough urban district.

The district was formed on 1 April 1974, as a merger of the borough of Helston, the urban district of Camborne-Redruth and Kerrier Rural District.

The borough was formed on 1 April 1974 by the merger of the former borough of Boston with Boston Rural District.

This only represented a net increase of ten, however as Port Talbot was formed from the merger of the borough of Aberavon and the urban district of Margam.

It was created in 1968 by a merger of the historic borough of Fowey and the much more populous St Austell urban district.

It was formed on 1 April 1974, under the Local Government Act 1972, by a merger of the borough of Wellingborough with Wellingborough Rural District.