This is from the FAQ’s on the notability website
As the car is owned by Motability Operations Ltd you will not accrue any personal no-claims bonus. However, some insurance companies may honour previous personal no claims history for up to 2 or 3 years
If you leave the Scheme, RSA Motability (RSAM) may be able to provide a claims history letter which details any claims made by you and your nominated drivers along with the period of time you have had claims free driving. Many insurance companies will accept this a proof of your claims history. You can request a claims history letter by calling RSAM on 0300 037 3737.