No not just for wine. Different departments like toys too. Only on for about a week. Go to the counter area where you return goods etc. Exchange blocks of £10 of nectar points for a voucher that doubles their value. So a wine voucher has to be spent on own brand wine, Taste the Difference. So £40 of wine for £20. You can pre buy the voucher before the time you spend it but only short lived offer. where from?