We ordered £440 worth of stuff on Thursday morning and it was delivered Friday. Yesterday I checked our bank account and Tesco had taken £506.40
Phoned them today to query it and they said the price on order is an estimate and the actual price is calculated on the day of delivery based on store prices that day (it does say that in the small print but it also says they will email you to let you know if promotional prices have changed, which they did not). The guy on the phone was very unhelpful and could only offer to email me an updated receipt to compare to the estimate. Both have been printed and my other half is currently going through them. So far we’ve found 40 promotional items that have been charged full price. Beware!!!