I've now been given a confirmed build date on w/c 5th September 2022 after ordering December 2021. Roughly how long would i be waiting until I get delivery of the car in the UK?
Generally speaking, it should be delivered 4-6 weeks after it's built. That does assume it is built to completion in the build week you have been given. There have been cars being built to 99% completion, then sat around waiting for parts to be fitted requiring semi conductors which have been in short supply.