LCC have said I'm scheduled for Dec build and Jan delivery. Checkout likely to be during Dec. Dealer demo cars "imminently".
So it looks like Protect/Enhance email and Update (we'll call you) email are going to everyone in batches being built from now to end Dec, including the Update email also going to people who've already checked out.
There is a batch of cars about to be scheduled into deliveries, which I interpret as the 25-ish who have already done checkout.
A few have been told Oct build and Nov delivery. Not seen anyone so far saying they've been told Nov build and Dec delivery. Most seem to be Dec build and Jan delivery.
Edit: except
@emiraspain just posted as the first I've seen with a Nov build and Dec delivery.