Thank you, was successful using your method, got £250 off with a Nexus 4 from 10 years ago, the battery still holding charge to my surprise.
Delivery date is still the 26th instead of 21st on the main site. But £1151 for the Fold 4 and I still can sell my Flip 3 is a better deal than trade my Flip3 to get the Fold 4 for £1100 on the main site.
The phone is now in preparing dispatch mode as 11am today, got the IEMI no and looks like Royal Mail tracking no. Still says 26th before 10:30am.