I don’t think anything has changed since I was unfortunate to have a very large crack in my screen 10 years ago and Autoglass came to my home to renew it.
Quote from Motability web site “if necessary, arrange for an Autoglass technician to visit you. You will need to tell them you are a Motability customer and present your certificate of insurance”
Number for Motability customers to Autoglass is 0300 037 9944.