I thought this was worth mentioning if you regularly shop at Tesco.
If you are a Clubcard holder you will know about the Vouchers that turn up in the post now and then, these vouchers are then spent in store.
Tesco have now launched a new 'Double Up' promotion which currently includes wine. How it works- when your vouchers arrive take them to the customer service desk and tell them you would like to 'double up' on wine.
Example: They will take your '£10' (or any value) voucher and hand you back a £20 voucher which can only be used on wine.
It’s a no-brainer surely?