A cross-party committee of MPs has called on the UK government to return £1.2 billion of pension funds to ex-miners.
The UK government has received 50% of surpluses from the Mineworkers Pension Scheme since its privatisation in 1994, in return for guaranteeing that the value of pensions will not decrease.
This means that the UK government has received £4 billion that would have otherwise gone toward miners' pensions.
Miners in the UK receive an average weekly pension of £84. The proposals of the committee would add an additional £14 per week on average to the pension.
Chairman of the committee David Jones MP said:
"Mining communities have suffered from pit closures for generations, with many pensioners now living on low incomes.
"We believe fixing this historic injustice for pensioners in our former mining communities is the right thing to do and that now is the right time to do it. We call on Minister today to act now."