A round up of the offers.
- Quicdo - 5%/£100 cashback (first 500 people)
- TCB - 5%/£100 cashback
- Samsung - up to £400 trade in
- Blue Light Card - up to 10% off purchase price, also looks like you might be able to stack with Samsung's trade in offer
- 10% off Samsung code (search Twitter)
Annoyingly I can't trade in my Note9 for the S23, though Samsung offer trade in for the Note9 generally on their website just not for their new release. A shame as I would have been able to get the 512GB for £924 (Blue Light + trade in).
Edit - specific offer
here that doesn't look too bad (need to delve in a bit more).