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Nigel Marriott's Blog

An independent statistician using data to understand our world and to predict the future

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Pay Gap Data #9 – Where can I find gender pay gap data for 2025?

October 6, 2026 By Nigel Marriott

The government requires nearly all employers with a headcount of 250 or more on their snapshot date to submit gender pay gap data.  All data is available to the public and can be found on the government’s gender pay gap website.  I have downloaded this to create a more user friendly and visually informative spreadsheet for you to download and use.

All data shown here is up to date as of 1st October 2026.  The next update is planned for January 2027.

[Read more…] about Pay Gap Data #9 – Where can I find gender pay gap data for 2025?

Filed Under: Diversity Tagged With: 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, data quality, Gender Pay Gap, pay gap data, Presenting data

Pay Gap Trends #9 – Employer Gender Pay Gaps in 2025 – The Numbers

April 8, 2026 By Nigel Marriott

The deadline for employers to submit their 2025 gender pay gap data has now passed.  So what do the numbers tell us about what happened in 2025?  How have these changed since 2024 and 2017 when employer gender pay gap reporting (GPGR) became mandatory?  Read on to find out the answers and why I have concerns about the government’s plans to make it mandatory for employer to publish action plans to reduce their gender pay gaps.

[Read more…] about Pay Gap Trends #9 – Employer Gender Pay Gaps in 2025 – The Numbers

Filed Under: Diversity Tagged With: Gender Pay Gap, ONS, pay gap trends, Pay Gaps, Presenting data

Pay Gap Case Study #8 – 33 London Councils – We Are One

November 18, 2025 By Nigel Marriott

I am breaking a golden rule of pay gap reporting in this article, I am benchmarking the 33 London Borough Councils on their gender pay gap data!

Before you gasp in horror, let me say straightaway the outcome of this article is complete vindication of this golden rule.  Benchmarking of employer pay gap data is statistically worthless.  Pay gap data of all kinds is inherently multivariate and cannot be reduced to one number league tables.  The story I will tell of the 33 councils of London in 2024 proves this point in spades.  In effect, none of the councils have a gender pay gap despite all of them publishing data to the contrary.

[Read more…] about Pay Gap Case Study #8 – 33 London Councils – We Are One

Filed Under: Diversity Tagged With: Chi-Squared Test, Correlation, Gender Pay Gap, Mean, Median, Pay Quarter Breakdown, PCA, principal components analysis, Principal Components Modelling, Representation Gap, Swap Number

Pay Gap Data #8 – Where can I find gender pay gap data for 2024?

October 6, 2025 By Nigel Marriott

This post was updated on 6th October 2025.  The next update is planned for early January 2026.

The government requires nearly all employers with a headcount of 250 or more on their snapshot date to submit gender pay gap data.  All data is available to the public and can be found on the government’s gender pay gap website.  I have downloaded this data and created a spreadsheet to present the data in a more user-friendly and visual format.

[Read more…] about Pay Gap Data #8 – Where can I find gender pay gap data for 2024?

Filed Under: Diversity Tagged With: 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, data quality, Gender Pay Gap, pay gap data, Presenting data

Stats Training Materials – Pay Gap Analytics

October 1, 2025 By Nigel Marriott

*** Updated with links B16 and P9, P10 and P11 for 3 presentations I have given recently on gender & ethnicity pay gap reporting.  I have also added new sections I & J**

The 5 steps to closing a pay and/or representation gap are –

  1. Define what success looks like i.e. where you want to be in the future
  2. Measure where you are today
  3. Analyse your data to understand why you are where you are today & what the key drivers are of your gaps
  4. Implement actions which move you from where you are today to put you on the path to where you want to be in the future
  5. Control the key drivers to ensure you are on the right track

All steps require the use of statistical thinking and statistical methods.  Other skills and processes are also needed but they cannot succeed on their own without the help of statistical thinking.

[Read more…] about Stats Training Materials – Pay Gap Analytics

Filed Under: Stats Training Tagged With: Analytics, Data journalism, Gender Pay Gap, Pay Gaps, Presenting data, Statistical Concepts, Statistical Thinking

Pay Gaps #32 – My Response to the Ethnicity & Disability Pay Gap Reporting Consultation

June 9, 2025 By Nigel Marriott

The government’s consultation on whether ethnicity and disability pay gap reporting should be made mandatory for large employers has now closed.  I submitted a response in my capacity as a professional statistician with 7 years experience of helping employers to get to grips with pay gap reporting.  My response was in two parts, a briefing note of the 9 statistical challenges that have to be confronted for a workable reporting system to be introduced and my answers to the 33 questions posed by the government in their consultation.

** The government published its response to the consultation on 25th March 2026 (link in next section) **

*** This post was updated on 9th June 2025 with links to my final response.  Links to my draft response can be found at the end of this post. ***

 

[Read more…] about Pay Gaps #32 – My Response to the Ethnicity & Disability Pay Gap Reporting Consultation

Filed Under: Diversity Tagged With: Consultation, Disability, Disability Pay Fingerprint, Ethnicity, Ethnicity Pay Fingerprint, Ethnicity Pay Gap, Gender, Pay Gap Report, Pay Gaps, Pay Quarter Breakdown, PQB, Recommendations, UK Government

Stats Training Materials – Statistical Inference & Hypothesis Testing

March 8, 2025 By Nigel Marriott

Mention P-values and most people will probably shudder at some memory of an incomprehensible lecture or lesson on statistical tests.  Words like null hypotheses, t-tests, statistical significance might pop into your mind with little understanding of what they are about.  What you may know is that scientists have to report a p-value for any experiment they do or do they?

The area of Statistical Inference is a core area of study for any statistician.  Put simply, Inference means to infer from the observations you’ve made about your data and to draw conclusions about what might be happening in real life.  There are two parts to Inference.

[Read more…] about Stats Training Materials – Statistical Inference & Hypothesis Testing

Filed Under: Stats Training Tagged With: Confidence Intervals, Evidence, Evidence Hierarchy, Hypothesis Testing, P-values, Statistical Training

Stats Training Materials – Forecasting & Risk Modelling

March 1, 2025 By Nigel Marriott

All organisations want to understand what happened in the past and what will happen in the future.  The use of statistics and statistical thinking is essential to be a better forecaster but that doesn’t mean it is easy!  At the same time, we are bombarded with forecasts in the media which can make it difficult to decide which forecasts to pay attention to and which can be ignored.

My course “Identifying Trends & Making Forecasts” is all about doing the basics right when it comes to analysing trends and making predictions.  To support this course, here are links to material in the public domain covering the following themes:-

[Read more…] about Stats Training Materials – Forecasting & Risk Modelling

Filed Under: Stats Training Tagged With: forecasting, Forecasting model, Forecasts, Statistical Training, Teaching Materials, trend analysis

Stats Training Materials – Sampling & Surveys

January 17, 2025 By Nigel Marriott

The core expertise that Statisticians offer to the world is drawing conclusions from small samples.  Therefore, knowing how to design surveys, estimate the right sample size, decide on the right way to ask the question or measure a property are all essential skills for any statistical thinker.  The skills you need to be competent in Sampling & Surveys are best captured by my Survey Wheel.

[Read more…] about Stats Training Materials – Sampling & Surveys

Filed Under: Stats Training Tagged With: data quality, Measurement Error, Opinion Polls, Polling, Sample size, Sampling, Segmentation, Surveys

Pay Gap Trends #8A – Is a Smaller Pay Gap Good News?

January 3, 2025 By Nigel Marriott

The gender pay gap in the UK continues to narrow in 2024.  The good news is the pay gap is narrowing at a faster rate since 2017 when Gender Pay Gap Reporting (GPGR) for employers become mandatory.  The bad news is women are not progressing up the pay scale and are working longer hours, men today are worse off than their fathers were 20 years ago and the smaller pay gap is simply the by-product of wage compression induced by above inflation rises in the minimum wage.  This is a sobering picture which tells me on balance, a smaller pay gap is not good news.

This article is part A of a 2-part blog.  Part B will be published at a later date.

[Read more…] about Pay Gap Trends #8A – Is a Smaller Pay Gap Good News?

Filed Under: Diversity Tagged With: Gender Pay Gap, Median, Minimum Wage, ONS, Pay Differential, pay gap trends, trend analysis

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