First level NUTS of the European Union in the context of "Kentriki Ellada"

The regions of England, formerly known as the government office regions, are the highest tier of sub-national division in England. They were established in 1994 and follow the 1974–96 county borders. They are a continuation of the former 1940s standard regions which followed the 1889–1974 administrative county borders. Between 1994 and 2011, all nine regions had partly devolved functions; they no longer fulfil this role, continuing to be used for limited statistical purposes.

While the UK was a member of the European Union, they defined areas (constituencies) for the purposes of elections to the European Parliament. Eurostat also used them to demarcate first level Nomenclature of Territorial Units for Statistics (NUTS) regions ("NUTS 1 regions") within the European Union, which in 2021 were superseded by International Territorial Level (ITL) regions ("ITL 1 regions").

Nisia Aigaiou, Kriti (Greek: Νησιά Αιγαίου, Κρήτη), meaning "Aegean Islands, Crete", is a first level NUTS administrative division of Greece created for statistical purposes by the European Union. The NUTS division is not used by Greece for any administrative reasons. It contains the three administrative regions of North Aegean, South Aegean, and Crete. As of 1 January 2019 it had a population of 1,200,055 inhabitants.

Per January 2015, the Greek NUTS regions have been redefined. The first-level region of Nisia Aigaiou, Kriti however wasn't changed.

International Territorial Level (ITL) is a geocode standard for referencing the subdivisions of the United Kingdom for statistical purposes, used by the Office for National Statistics (ONS). Between 2003 and 2021, as part of the European Union and European Statistical System, the geocode standard used for the United Kingdom were Nomenclature of Territorial Units for Statistics or NUTS. The NUTS code for the UK was UK and the NUTS standard had a hierarchy of three levels, with 12 first level regions, which are currently mirrored by the ITL classification, of which 9 regions are in England. The sub-structure corresponds to administrative divisions within the country. Formerly, the further NUTS divisions IV and V existed; these have now been replaced by Local Administrative Units (LAU-1 and LAU-2 respectively).Between 1994 and 2011, the nine regions had an administrative role in the implementation of UK Government policy, and as the areas covered by (mostly indirectly) elected bodies.