Search

How can we help?

Icon

Equal Pay: material factors don’t just evaporate

In Walker v Co-operative Group Limited, the Claimant was promoted in early February 2014 to the role of Group Chief HR Officer, with a salary of £215,000. This was her first executive role at this level.

At the time, The Co-op was on the verge of financial collapse and decided that it needed to restructure the executive team to deliver a critical transformation project. In March 2014, it placed the Claimant’s role in the same tier as the Chief External Affairs Officer and the Group General Counsel, both male. The Claimant’s salary was increased to £425,000 while her male peers were paid over £500,000 each. The Claimant subsequently brought claims including equal pay.

The tribunal accepted the employer’s reasons for initially setting the pay at this level. Unlike the claimant, the Chief External Affairs Officer and the Group General Counsel were vital to the survival of the Co-op, highly experienced executives and there was a realistic flight risk with them at a time when it was vital to maintain stability.

The employer carried out a job evaluation survey which scored the Claimant’s role higher than her male colleagues.

However, by 2015 the immediate crisis had passed. The employer carried out a job evaluation survey which scored the Claimant’s role higher than her male colleagues. The tribunal therefore found that the reason for the difference in pay had become ‘historical’ and the material factor defence no longer applied.

This was overturned by the EAT and Court of Appeal. The Court of Appeal found that dismissing the pay disparity as ‘historical’ missed the point as it remained the cause of the pay differential at the relevant time.  it further stated that it was well established that a job evaluation study does not have retrospective effect and that the material factors relating to experience and market rate continued to explain the difference between pay even after the job evaluation study.

The Court of Appeal made clear that provided the employer explains the reason for the pay differential and it is not tainted by sex, it does not then need to go on to justify the pay differential.

Disclaimer
This information is for guidance purposes only and should not be regarded as a substitute for taking legal advice. Please refer to the full General Notices on our website.

Author profile

Monica Atwal

Managing Partner

View profile

+44 118 960 4605

About this article

Read, listen and watch our latest insights

art
  • 29 April 2026
  • Privacy and Data Protection

UK Data Protection – what’s new?

Having come into force on 19 June 2025, it comes as no surprise that we are now seeing the effects of the Data (Use and Access) Act 2025 (‘DUAA’). This article highlights a few of DUAA’s fundamental reforms, delves into one in particular, and examines how this will impact the recruitment sphere.

art
  • 29 April 2026
  • Employment

Employment Rights Act: Changing key contract terms will be harder from January 2027

The Employment Rights Act 2025 (“ERA 2025”) introduces a new regime that restricts how employers can change certain core contractual terms, with the key provisions now expected to commence on 1 January 2027.

art
  • 28 April 2026
  • Immigration

Proposed expansion of right to work checks from 1 October 2026: what employers need to know

The Home Office has published a consultation on a draft Code of Practice addressing how employers can avoid unlawful discrimination while preventing illegal working. The draft indicates a planned expansion of right to work (RTW) check obligations to take effect from 1 October 2026.

Pub
  • 27 April 2026
  • Corporate and M&A

Quarterly Insights: Key Corporate & Commercial Topics – Q2 2026

Join Stuart Mullins and Emma Docking as they explore key corporate and commercial topics, including SME growth and exit strategies for 2026, EMI schemes for employee incentives, and the importance of drag along and tag along rights.

art
  • 22 April 2026
  • Commercial Real Estate

Historic rent reviews: A warning for tenants

We have been asked whether a landlord is able to operate historic rent reviews. 

art
  • 14 April 2026
  • Employment

Updates to Vento Bands 2026: Injury to feelings awards

For discrimination and detriment cases, compensation can also cover non-financial losses, which, in most cases, will include an injury to feelings award.