Teesside Park Teesside Park Teesside Park is a retail superstore and leisure development in Thornaby-on-Tees, built in 1988. Located just off the A66 near the A66/A19 interchange, it is split between the unity authorities of Stockton-on-Tees (retail park) and Middlesbrough (leisure park) with the line of the "Old River Tees", which runs down the middle of the development, forming the boundary between the two authorities. The development has an eye-catching central building that was constructed in 2008. The Stockton-on-Tees section is within the town of Thornaby-on-Tees and is all located within the ceremonial county of North Yorkshire. The driving force behind its
County Borough of Teesside County Borough of Teesside Teesside was, from 1968 to 1974, a local government district in northern England. It comprised a conurbation that spanned both sides of the River Tees from which it took its name. The district had the status of a county borough and so was independent of the County Councils of the North Riding of Yorkshire and of County Durham, in which it was geographically located. The River Tees formed the historic county boundary between Yorkshire and Durham. A continuous conurbation had built up around the mouth of the river, increasing greatly in population from the nineteenth century