I would definately place an order in December. BMW yearly price increase is January so could affect the AP negatively. The i4 35 sport is on the list, find it easy to get in and out having arthritis so have ordered, the most popular BMW on Mobility. Marshalls of Grimsby are giving £500 contribution towards.
Lead times vary between models, the 1st thing is a showroom visit for your wife to see which model is right for her.
2024 - KIA EV6 GT Line AWD
2019 - 2024 BMW X1 2.0d X Drive Sport Auto
2017 -2019 Audi Q3 2.0d Quattro Sport Line Plus
2005 - 2017 Honda CRV Exec 2.0d