A FUTURE Labour government will reverse any Tory cuts to tax credits, shadow chancellor John McDonnell said yesterday.

Mr McDonnell committed to restoring the benefit for low-paid workers and poor families if Chancellor George Osborne goes ahead with plans to cut them from April 2016.

The announcement came ahead of tomorrow’s opposition day debate in Parliament on the cuts and marks a transformation two months after former acting leader Harriet Harman ordered Labour MPs to back the cuts.

Pilling the pressure on the Tories, Mr McDonnell tweeted: “We are calling on Osborne to reverse his decision to cut tax credits.

“If he doesn’t reverse these cuts, we’re making it clear that we will.”

A huge 3.2 million families are braced to see their income slashed by an average £1,300 a year, according to House of Commons research, with some standing to lose up to £3,000.

The cut was likened to Thatcher’s poll tax yesterday by shadow chief secretary to the Treasury Seema Malhotra.

Labour believes anger over these cuts could cost the Tories 71 seats at the 2020 general election after party researchers found that the number of people affected in those constituencies was larger than the majority of the incumbent MP.

Ms Malhotra said the Tory MPs have a “clear choice” in Tuesday’s vote and warned: “Hard-working families who are set to be affected will be watching.”

Speaking on the BBC’s Andrew Marr programme yesterday, she predicted enough Tories could rebel to see Labour win the vote.

“I believe we can [win],” she said. “I very much hope that we can.”

Shadow work and pensions secretary Owen Smith also revealed he was in discussions with Tory MPs concerned over the cuts.

“I have spoken to lots of Conservatives last week and we will be doing it again next week and I think some of them will vote for us,” he told Sky News.

Former Tory leadership candidate David Davis is among MPs who have criticised Mr Osborne for cutting in-work benefits.

Outspoken Tory backbencher Andrew Mitchell called it a “very tough measure” yesterday but said he would vote for the cut if it was “tweaked.”