I left the scheme in 2019 after DLA to PIP transfer went very bad. I never made a claim with Motability, but got proof of around 12 years NCB. This was 2 separate ones for me and my wife which was better than regular insurance that doesn’t offer NCB to named driver.
LV accepted it without issue. As a side note, non original wheels must be declared. LV said that so long as the size is the same, they don’t need notifying.