I can confirm this is correct for me, my lease is up 20th December 2023, so I can officially order a new one on the 20th September 2023. I went into Mazda and Renault June 2023 and enquired about waiting until September to order a new car and the waiting lead times on car availability. Mazda were taking new car orders un-officially as long as I could show them proof of my award letter from DWP with the enhanced rate for Mobility and it had at least 12 months remaining. Renault said they could look at ordering in August (1 month prior) as there is only a 3 month lead times on all makes an models, as the new vehicles were in the UK at the docks, stuck on container ships. I did ask Skoda, Kia and Hyundai and these said I need to wait until my lease date and have my new Customer Reference Number (CRN).