Delays in processing the Government's new Personal Independence Payment (PIP) will cause "real distress for vulnerable claimants", the Public Accounts Committee chair has said.
Margaret Hodge said claimants were left facing "uncertainty and potential financial difficulties", after the National Audit service found claimants were having to wait longer for claims to be processed than under the previous system.
"I was shocked to learn that, not only will Personal Independence Payment claims cost almost three and half times more to administer than Disability Living Allowance, they also take double the amount of time to process," the Labour MP said.
"The current backlog and delays in processing claims are simply unacceptable and will no doubt cause real distress for vulnerable claimants."
More top news
Accompanied by the Duke of Edinburgh, the Queen will attend the opening ceremony of the fifth session in the Holyrood chamber.
Ms Leadsom has received the backing of Ian Duncan Smith, the former work and pensions secretary.
The former shadow work and pensions secretary is considered a more viable candidate than Angela Eagle, a Labour source has told ITV News.