Teesside the four independent unitary authority boroughs of Hartlepool, Stockton, Middlesbrough and Redcar and Cleveland (a renamed Langbaurgh). At this time they were returned to the counties of North Yorkshire and County Durham for ceremonial purposes, with Stockton-on-Tees becoming the only district in England split between two ceremonial counties. In 1998 the neighbouring Borough of Darlington also became an independent unitary authority and this along with the four former Cleveland boroughs form the sub-region of the Tees Valley which is used for statistical purposes and governmental organisation. The name Tees Valley is increasingly promoted for economic and cultural connections, though Teesside,
County Borough of Teesside two-tier system of counties and districts. One of the new counties "Area No.4" was based on the Teesside conurbation. The county was eventually named Cleveland on the suggestion of several local authorities in the area. Originally it was intended that Teesside would continue as non-metropolitan district of Cleveland. Peter Walker, Secretary of State for the Environment stated in January 1972: "It would be wholly wrong... to divide again the County Borough of Teesside... it has made all its investment in a county borough of that size, and it would be wholly wrong to tear it to pieces." However, the boundaries