On 15 March I provided the House with a statement setting out how the work my Department was undertaking to correct underpayments that occurred when converting Incapacity Benefit claims to Employment and Support Allowance (ESA) between 2011 and 2014 was progressing. I wanted to take this opportunity to provide the House with a further update.

In March I explained that my Department would resource this exercise with 400 staff to make sure we could review cases at pace. This work is now underway with staff reviewing cases, contacting claimants and correcting claims; so far we have paid out over £40 million in arrears.

The Department has analysed the relationship between “official error” and section 27 of the Social Security Act 1998 in regulating how and to what extent arrears can be paid. As a result of the conclusions of this analysis, we will now be paying arrears to those affected back to their date of conversion to ESA.

My Department will be contacting all those identified as potentially affected as planned. Once an individual is contacted, and the relevant information gathered, they can expect to receive appropriate payment within 12 weeks. I can also confirm that once contacted, individuals will be provided with a dedicated free phone number on which they can make contact with the Department.

Where we have already corrected cases and paid arrears from 21 October 2014 we will review the case again and pay any additional arrears that are due prior to that date.

I hope this will help Members to provide reassurance, to their constituents who think they may have been affected, that they will receive all the money they are entitled to.