How to compare England, Scotland, Wales and Northern Ireland fairly
Many public services are devolved, so England, Scotland, Wales and Northern Ireland often measure the same subject in different ways. Before comparing, check what area each figure covers, who produced it, whether the definitions match, and whether you are comparing totals or rates per head. Where the ONS or a joint UK release has already harmonised the data, use that.
Why four-nation comparisons go wrong
Health, education, much of housing and, in Scotland and Northern Ireland, policing and justice are devolved. Each government collects data to run its own services, so targets, definitions and counting rules differ. A comparison can be arithmetically accurate and still compare different things.
Three questions catch most problems:
Does each figure cover the same area? "UK", "Great Britain" and "England and Wales" are different populations. See Great Britain vs UK and England and Wales .
Is each figure counted the same way?
Are you comparing totals, or rates that allow for population size?
Step 1: find the producer for each nation
UK-wide or England: the ONS and UK government departments.
Scotland: Scottish Government statistics , Public Health Scotland for health, and National Records of Scotland for population and deaths.
Wales: Welsh Government statistics and research and the StatsWales data service.
Northern Ireland: the Northern Ireland Statistics and Research Agency (NISRA) and NI departments.
Our guide to NHS statistics in Scotland, Wales and Northern Ireland lists the health releases for each.
Sources: Scottish Government statistics, Public Health Scotland, National Records of Scotland, Welsh Government statistics and research, StatsWales, Northern Ireland Statistics and Research Agency (NISRA)
Step 2: check whether a harmonised comparison already exists
Statisticians across the UK publish joint or compiled releases where definitions can be lined up. Start there. Population is a good example: the ONS mid-year estimates bring together figures from the ONS, National Records of Scotland and NISRA on a consistent basis.
On 13 October 2026 we opened Population estimates for the UK, England, Wales, Scotland and Northern Ireland: mid-2025 , released on 1 October 2026. Its Table 1 gives:
UK: 69,483,900, up 227,700 (0.33%) on mid-2024
England: 58,834,800, up 0.39%
Scotland: 5,545,500, up 0.04%
Wales: 3,175,200, down 0.09%
Northern Ireland: 1,928,400, up 0.03%
The bulletin also links the national publications: National Records of Scotland's estimates (released 14 July 2026), the Welsh Government's commentary (29 July 2026) and NISRA's estimates (24 September 2026). These are the denominators to use when you turn totals into rates; see per capita and rate per 100,000 .
Source: Population estimates for the UK, England, Wales, Scotland and Northern Ireland: mid-2025
Turning totals into rates
Totals favour larger nations. To compare, divide each count by the population and multiply by a convenient base. Using the mid-2025 populations above, an imaginary count of 1,000 events would be:
Wales: 1,000 ÷ 3,175,200 × 100,000 = 31.5 per 100,000
Scotland: 1,000 ÷ 5,545,500 × 100,000 = 18.0 per 100,000
Northern Ireland: 1,000 ÷ 1,928,400 × 100,000 = 51.9 per 100,000
The same total gives very different rates. Where age matters, such as deaths or illness, official releases often publish age-standardised rates that also allow for differences in age structure; use those rather than calculating crude rates yourself. See crude rate .
Worked example: A&E waiting times across the UK
A frequent claim compares the share of A&E patients waiting more than four hours in each nation. The ONS, working with NHS England, Public Health Scotland, the Welsh Government, the Department of Health in Northern Ireland and the Department of Health and Social Care, examined exactly this in Accident and emergency wait times across the UK , released on 28 February 2024 and covering January 2013 to September 2023. Its main points say:
data collection for 24-hour consultant-led departments is "sufficiently similar between England, Scotland, and Wales to make broad comparisons";
"Northern Ireland's A&E wait time data cannot be compared with that from England, Scotland, and Wales because of wider differences in A&E healthcare data collection policy";
the overall number of A&E attendances "can be broadly compared between all four countries of the UK".
So a ranking of four-hour performance that includes Northern Ireland alongside the other three nations goes beyond what the official comparison supports, while a comparison of attendances per 1,000 people across all four is within it. Apply the same test to any cross-UK league table: look for a joint or ONS comparability note before ranking.
Source: Accident and emergency wait times across the UK
Subjects where definitions often differ
Hospital waiting lists. Each nation has its own targets and counting rules for waiting times, so headline lists are not like for like.
School qualifications. Scotland has its own qualifications, such as National 5 and Highers, so exam results are not directly comparable with GCSEs and A levels.
Recorded crime. Police Scotland and the Police Service of Northern Ireland are separate forces, and recorded crime for Scotland and Northern Ireland is published separately from England and Wales, under different counting rules.
Population-based surveys. UK-wide surveys can give nation breakdowns, but smaller nations have smaller samples, so estimates are less precise and are sometimes published as averages over several years.
Step 3: line up definitions yourself when there is no joint release
Read the definitions or background notes for each nation's series side by side.
Check the time period: financial years in one nation and calendar years in another, or different snapshot dates, are common.
Check what is counted: people or episodes, a stock on one day or a total over the year, all services or one type.
Use the same population source for every rate.
If the definitions cannot be matched, compare each nation with its own past instead of with each other.
For the labour market, ONS regional and national figures use one survey and one definition across the UK, so they are a sound basis for comparison; our unemployment answer explains the measure.
Checklist
Checked the area each figure covers (UK, GB, E&W, England)
Found the responsible producer for each nation
Looked for a joint or ONS harmonised release first
Compared definitions, counting rules and periods
Converted totals to rates using one population source
Avoided ranking where official notes say data are not comparable
Official sources used in this guide
Sources: ONS: Population estimates for the UK and its countries, mid-2025, ONS: Accident and emergency wait times across the UK (2024), Scottish Government statistics, Welsh Government statistics and research, NISRA statistics, Public Health Scotland