Labour is claiming that 46,000 sick and disabled claimants have so far been hit by the decision not to pay an additional amount to claimants in the work-related activity group of employment and support allowance (ESA).
The work-related activity component of ESA, paid at a rate of £29.05 a week, was ended for new claimants in April 2017.
According to Labour, there are now 46,000 ESA claimants whose ESA claim is under a year old and who will therefore not have been eligible for the work-related activity component.
Of these, 29,000 claimants have a mental health condition as their primary disabling condition.
Labour have called on the Conservatives to reverse the cut.