To give people an idea of timings, my order progressed as follows:
80 Sportline Plus ordered 13th September 2023. Quoted 23 week lead time.
Build week 49 (confirmed 6 weeks after order / 6 weeks before build week).
Converted to 85 Sportline Plus (non-X).
Shipped mid-December. Arrived into UK port early January. Delivery to dealer due 19th January. Collection expected from 23rd January.
That’s a 19 week lead time.