Women campaigning on the impact of changing the state pension age have vowed to continue after the government rejected their compensation.
“We are certainly not giving up the fight,” said Debbie de Spon, membership director of the Women Against State Pension Inequality (Waspi) campaign.
Meanwhile, politicians have called on the government to reverse its decision, with Labor MP Brian Leishman saying he was “dismayed”.
But the government said there was no evidence of “direct financial loss” and there was “considerable awareness” of the changes to the pension age.
Campaigners say 3.6 million women born in the 1950s have not been properly informed about the state's planned increase in retirement ages to bring them in line with men.
Ms de Spon told the BBC Radio Four Today program that the government's decision was “very disappointing” and that many members of the Labor cabinet had been “very supportive of Waspi” over the years.
“We think it’s time to call on that support,” she said.
Nine months ago, a parliamentary ombudsman recommended compensation of between £1,000 and £2,950 for each of those affected, after six years of investigation.
Ms de Spon said: “It would rather make a mockery of this system if (the government) could cherry-pick which parts of this investigation it chooses to accept.”
The Liberal Democrats previously said the stance “set an extremely worrying precedent” in rejecting the ombudsman's findings.
However, the government said compensation could cost up to £10.5 billion.
Prime Minister Sir Keir Starmer said it would “place an additional burden on the taxpayer”.
