Probably a pricing error, so orders may be cancelled.
It can be fun to give it a go, and it's very unlikely the shop will charge you full price, but don't be too disappointed if it doesn't work out! Here's what Citizen's Advice has to say on it.
Be gentle 1st post.
Filled the car with Momentum99 £6 worth to try it out. Then look at the receipt to find out that it was the same price as Unleaded95. Not all petrol stations sell it at the same price so check the pump pricing before filling.
Tesco rewards its Clubcard members with exclusive deals in-store and online. To get Clubcard Prices, scan your Clubcard app or tap your Clubcard/key fob at the checkout. If you're shopping online, you'll have a Clubcard number on your account already, so you get Clubcard Prices automatically. More info from Tesco
Delivery and returns at Tesco
Delivery prices vary depending on the delivery slot you choose.
The minimum basket value is £40 for home delivery, and £25 for Click + Collect
Unwanted items can be returned to any Tesco Store (excluding Express stores). Simply bring your delivery note to get a replacement or refund. For perishable food items, you need to return these within their its use-by date.