Thousands of prison service workers in England and Wales are to share £50m after a deal to settle equal pay claims, according to a leading union.
Complaints focused on pay gaps between officers and admin staff
The Public and Commercial Services Union said individual payouts would range from between £500 and £50,000.
The case covers mostly women working in administrative and managerial jobs in the prison service.
The union argued that pay gaps of up to £4,000 existed between the jobs when compared to other service roles.
Starting salaries would also be increased by up to £3,000, the PCS union said.
"This is a significant step in addressing the pay inequalities that riddle the civil service," PCS general secretary Mark Serwotka said.
"After more than seven years of legal process, the perseverance of PCS members means that the Prison Service are taking steps to address the glaring pay inequalities that exist."
Prison Service director general Phil Wheatley said: "These were complex cases which needed to take into account the different and demanding requirements of jobs within the prison service."