If you get your groceries delivered by tesco then you can get any wine order delivered at the same time for free*. Just check out both orders for the same delivery slot. Initially you will get charged delivery for both but a few days later (it can take just over a week but it's never failed yet with at least 5 or 6 orders - not that we drink that much, they can be quite small orders honest!) you get an email saying they have refunded the delivery charge to your card. If for any reason this doesn't happen then send them an email and they should refund it for you.
I know they have free delivery on any orders from time to time (like now) but this can be used any time.
Good for wine orders using those vouchers for money or points on a £50 spend etc.
*note, if the grocery delivery charge is lower than the wine delivery they might refund the lower charge so it might be not quite free but definitely discounted.