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). From 2003 and until 2020 it functioned as part of the European Union and European Statistical System's geocode standard Nomenclature of Territorial Units for Statistics or NUTS.
Following Brexit, the ONS set to develop a domestic statistical classification framework separate from NUTS. Initially, the ITLs were a mirror to the pre-existing NUTS system, they retained the same three level hierarchy and boundaries used for NUTS in the United Kingdom from 2018. ITLs were set to follow a similar review timetable to NUTS, being reviewed every three years. The ONS developed new official GSS codes of ITL geography aligned with the existing NUTS codes. From 1 January 2021, the ONS encouraged "ITL" be used as a replacement to the "NUTS" designation, with lookups between NUTS and ITL maintained and published until 2023.
The current ITL classification since 2025, has 12 regions at ITLs 1, 46 at ITL 2 and 182 at ITL 3.
The first ITL classification in 2021, following Brexit, was a mirror of the previous NUTS classification with slight modification, the ONS listed 12 regions at ITL 1, 41 regions at ITL 2, and 179 regions at ITL 3. "UK" in the NUTS codes were replaced with "TL".
The last NUTS classification is dated 21 November 2016 and was effective from 1 January 2018, listed 12 regions at NUTS 1, 40 regions at NUTS 2, and 174 regions at NUTS 3 level.
List of ITL regions
2025 The current ITL classification since 2025, has 12 regions at ITLs 1, 46 at ITL 2 and 182 at ITL 3.
Level 2 +2021 and 2025 Level 2 comparison 2021 Code 2025 — — — — — — Tees Valley and Durham TLC1 — Northumberland, and Tyne and Wear TLC2 — — TLC3 Tees Valley — TLC4 Northumberland, Durham and Tyne & Wear Cumbria TLD1 Cumbria Greater Manchester TLD3 Greater Manchester Lancashire TLD4 Lancashire Cheshire TLD6 Cheshire Merseyside TLD7 Merseyside East Yorkshire and Northern Lincolnshire TLE1 East Yorkshire and Northern Lincolnshire North Yorkshire TLE2 North Yorkshire South Yorkshire TLE3 South Yorkshire West Yorkshire TLE4 West Yorkshire Derbyshire and Nottinghamshire TLF1 Derbyshire and Nottinghamshire Leicestershire, Rutland and Northamptonshire TLF2 Leicestershire, Rutland and Northamptonshire Lincolnshire TLF3 Lincolnshire Herefordshire, Worcestershire and Warwickshire TLG1 Herefordshire, Worcestershire and Warwickshire Shropshire and Staffordshire TLG2 Shropshire and Staffordshire West Midlands TLG3 West Midlands East Anglia TLH1 — Bedfordshire and Hertfordshire TLH2 Bedfordshire and Hertfordshire Essex TLH3 Essex — TLH4 Cambridgeshire and Peterborough — TLH5 Norfolk — TLH6 Suffolk Inner London - West TLI3 Inner London - West Inner London - East TLI4 Inner London - East Outer London - East and North East TLI5 Outer London - East and North East Outer London - South TLI6 Outer London - South Outer London - West and North West TLI7 Outer London - West and North West Berkshire, Buckinghamshire and Oxfordshire TLJ1 Berkshire, Buckinghamshire and Oxfordshire Surrey, East and West Sussex TLJ2 Surrey, East and West Sussex Hampshire and Isle of Wight TLJ3 Hampshire and Isle of Wight Kent TLJ4 Kent Gloucestershire, Wiltshire and Bath/Bristol area TLK1 — Dorset and Somerset TLK2 — Cornwall and Isles of Scilly TLK3 Cornwall and Isles of Scilly Devon TLK4 Devon — TLK5 West of England — TLK6 North Somerset, Somerset and Dorset — TLK7 Gloucestershire and Wiltshire West Wales and The Valleys TLL1 — East Wales TLL2 — — TLL3 North Wales — TLL4 Mid and South West Wales — TLL5 South East Wales — TLM0 Eastern Scotland — TLM1 East Central Scotland — TLM2 Highlands and Islands — TLM3 West Central Scotland North Eastern Scotland TLM5 North Eastern Scotland Highlands and Islands TLM6 — Eastern Scotland TLM7 — West Central Scotland TLM8 — Southern Scotland TLM9 Southern Scotland Northern Ireland TLN0 Northern Ireland
2021 ITL Following Brexit, the classification used by the ONS was replaced with ITLs. Between 2021 and the next review scheduled for 2024, the ITLs were a mirror of the NUTS classification adopted in 2018 (see below). All NUTS codes containing "UK" were changed to use "TL" for Territorial Level.
Former NUTS regions
2018 NUTS Level Corresponding subdivisions # NUTS 1 Wales, Scotland, Northern Ireland, 9 statistical regions in England 12 NUTS 2 Northern Ireland, counties in England (most grouped), groups of districts in Greater London, groups of unitary authorities in Wales, groups of council areas in Scotland 40 NUTS 3 counties, unitary authorities, or districts in England (some grouped), groups of unitary authorities in Wales, groups of council areas in Scotland, groups of districts in Northern Ireland 174
2016 NUTS
UKM2 (Eastern Scotland) was replaced with UKM7 (Eastern Scotland) along with associated NUTS 3 areas UKM3 (South Western Scotland) was replaced with UKM8 (West Central Scotland) and UKM9 (Southern Scotland)
2015 NUTS