Back in the 1990s, a row was brewing over the state pension.

After it was introduced for everybody back in 1948, men were entitled to receive it when they hit 65, but women started getting the payments from the age of 60.

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With more women heading to work and longer life expectancies, many argued it was time to even out the playing field and bring women’s retirement age in line with men’s.

And come 1995, John Major’s Conservative government introduced the Pensions Act, setting out a timetable to make the change.

The legislation said the qualifying age for the state pension would slowly increase over 10 years between 2010 and 2020.

But come 2010 and the entrance of David Cameron’s coalition government, there was a desire to make cuts and save cash.

In 2011, a new Pensions Act was introduced that not only shortened the timetable to increase the women’s pension age to 65 by two years but also raised the overall pension age to 66 by October 2020 – saving the government around £30bn.

The changes in the law led to a backlash from the women affected – namely those born in the 1950s.

They complained many women weren’t appropriately notified of the changes by the Department for Work and Pensions (DWP) back in 1995, with some only receiving letters about it 14 years after the legislation passed.

Others claimed to only have received a notification the year before they had been expecting to retire, aged 60, while more said they never received any communication from the department at all.

And when the law changed again in 2011, there was again little or no notice from the government as women had to re-plan their retirements once more.

Come 2015, a group of women impacted by the situation set up Women Against State Pension Inequality – or Waspi for short – to campaign on their behalf.

The group took no issue with plans to equalise the pension age, but they claimed millions of women had suffered financially because of the lack of time they had to plan their retirements.

By October 2018, Waspi had secured a full scale inquiry into the actions of the DWP by the Parliamentary and Health Service Ombudsman (PHSO).

It took five years for them to carry out their work, but when they released their report in March 2024, it was damning.

The PHSO said thousands of women might have been impacted by the DWP’s “failure to adequately inform them” about the change to their state pension age, and they ruled compensation was “owed”.

The report suggested the compensation figure per person – based on the sample cases its authors have seen – should fall between £1,000 and £2,950.

But the ombudsman’s chief executive, Rebecca Hilsenrath, said she had “significant concerns” the DWP will not act on its findings and its recommendations – which are not legally binding – so PHSO had “proactively asked parliament to intervene and hold the department to account”.

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Both the DWP and Number 10 have said they will consider the ombudsman’s report and respond to their recommendations formally “in due course”.

But the Liberal Democrats are calling on the government to confirm payouts for “these courageous women, who have tirelessly campaigned for justice after being left out of pocket”.