Name the built-up area subdivisions of England and Wales (the only parts of the UK where they are defined). The 2011 UK census introduced these areas as replacements for former ‘urban areas’ and based them on the following definition:

A new methodology to capture the areas has been used in the 2011 version of the dataset, but it follows the rules used previously so that results are broadly comparable. As before, the definition follows a ‘bricks and mortar’ approach, with areas defined as built-up land with a minimum area of 20 hectares (200,000 m2), while settlements within 200 metres of each other are linked. Built-up area sub-divisions are also identified to provide greater detail in the data, especially in the larger conurbations.