Got this in store today.

Go to the Buy Now button which goes to the Vodafone website. Then click on the hard-to-see link that says "Pay for your phone in one go" just under the bright red "Build your phone plan" button which displays the following:

Pay for your phone in one go
If you’d like to pay for the full cost of your phone upfront, the total cost of the phone is:

£441

Pay for your device in one go: Visit us in store for more information and full terms and conditions.

Google Stadia offer
Claim a Google Stadia Premiere Edition
Buy a Google Pixel 6 or Pixel 6 Pro (subject to availability), between 28/10/2021 at 00:01 am to 06/12/2021 at 23:59pm and claim Google Stadia Premiere Edition for free. Eligible customer accounts will be contacted within 3 working days of order completion with instructions to redeem. Participants must be 18 or older with a delivery address in the UK. Redemption window closes 16/12/2021 at 23:59pm.
 

So I know there is also a Bose headphone deal going on at the moment, but this deal is a MASSIVE saving over RRP and you get a free games console.