I’ve cleared my cache and can’t find the report I was thinking of but found this from Motability but again not totally what I was looking for but confirms a leaflet is being sent out. Looks like they’re already started revamping the customer site in readiness.
https://www.motability.co.uk/utilities/dwp/
a couple of month old but this might be of interest to some that’s not already read it.
https://www.motabilityoperations.co.uk/Press_release_with_half_year_report_2019.pdf
full report available if you want it.