It will be a paper exercise to identify claimants receiving PIP who either a). Gave details of mental health issues when they claimed, or b). Gave details of mental health issues when they were being assessed because they were transferring from DLA to PIP. That's what will trigger further investigation, but not everyone will go through another medical.
Basically what happened is in December the High Court made a decision on a legal challenge by claimants (3 of them) who gave mental health issues as the reason for mobility difficulties. The court found in favour of the claimants.
The challenge revolved around regulation changes last February that meant people with mental health issues could only get a maximum of 10 points on the Mobility section of the PIP claim. This means that they cannot qualify for the enhanced level of the mobility component of PIP. However, if a claimant gives physical reasons for mobility issues, then they could score 12 points and qualify for the enhanced level of the mobility component of PIP. The enhanced level of the mobility component enables claimants to be eligible for other services like the Motability scheme.
The decision means that if a person's condition - physical, mental or both - is deemed severe enough, it's now possible to score 12 points in the assessment and qualify for the enhanced rate of PIP mobility.
I suspect anyone who gave details of mental health issues who was awarded 10 points for the Mobility section will simply be awarded 12 points instead. My guess is that a score of less than 10 might be re-examined. The claimants who've not been mentioned as the ones who were disallowed PIP altogether because their score wasn't high enough. Some of them may have qualified if they could get 12 points instead of 10.
This will be a nightmare for the DWP which is already reviewing around 75,000 claimants moving Incapacity Benefit claimants onto the new ESA benefit.
When the migration started in 2011 there was an error in the assessment process and the Government said it only became aware of the problem in December 2016 after the Office for National Statistics published certain benefits statistics. This is actually not true because welfare rights group had identified the problem in 2014. As of November 2017 only about 1000 claimants had been contacted.
The awful thing is both these errors involve claimants who are ill or disabled and there no telling how many of them will have died.