[MargaretR]

I have just placed a Tesco online order and notice that their prices can be adjusted between order and delivery. The mail confirming the order states-

"Prices
Please note that the prices on our Grocery website are guide prices only. The actual price you pay will be the price charged in store at the time your order is picked for delivery. The actual order value cannot be determined until the day of delivery because the prices stated on the website may vary either above or below the prices in store on the day your order is picked and delivered."

I used to have Asda deliveries but its a while since now - I expect their price policy is the same.

So if you have ordered the beer and it has not been delivered yet, you may well be charged full correct price.