We have cards for most supermarkets if we sign up for them, but there's no necessity to sign...
2 of our Major supermarkets give a penny in the Pound spent...with one large chain the rebate is sent in vouchers every quarter... rounded up to the nearest £2 ...You can garner these points instore or at the petrol Garage . The vouchers have a use by date of up 2 years .. so you can save all your money off vouchers for a major event like Christmas for example and use them like Cash instore at face value... However you're prevented from spending them on (ironically ) on Fuel ... but also baby food, medicines or Alcohol and cigarettes are prohibited.. other than that you can spend them on all grocery items, clothing, and hardware, etc..
The best thing tho' is that you can choose not to use them like cash and instead go online to the supermarkets' website instead , and redeem them for up to 4 times their value on Air Miles, Holidays, Hotel room, train or coach tickets...experiences ..like helicopter trips...or day trips to Tourist sites..or amusement parks...etc...
You can use your vouchers to buy Furniture, home goods, tv's, cameras, computers , white goods, as well as normal groceries... ( but you don't get the 4x times value on these items)...but essentially they are free as you're using the vouchers to buy them
Recently I got an annual seniors train ticket which gives me 1/2 price rail fare anywhere in the country for just £15 of vouchers... which means for a whole year I only pay half price on the train..... I've got £30 now of vouchers at home and they don't expire until May 2019...£30 will get me 4x it's value which is a lot...I can book a weekend break for 2 with that at 4x it's value...
Also by being a card member we get money off vouchers sent every week if you spend over a certain amount... which have to be used within 6 days of the date of the voucher..
Right now I have a voucher which will give me £9 off if i spend £60 or more between the 3rd and the 9th of October.. and a one for the second and third week giving me £6 off a minimum £60 spend...
I might use them I might not...I can see it's an enticement to make me shop in that particular chain and spend more than I might ordinarily...so I don't always use those if I decide to shop elsewhere ...but if I know I'm likely to spend £60 or more in any given week then I'll do my shopping there.
The second major supermarket chain used to give 2p in the £1 but now recently has reduced that to 1p....however unlike the first major chain you get the money back at the till... so when your card is swiped at every transaction , the pennies build up... and once you've accumulated £2.50 you can then use them against the price of your groceries, and use them in 500 point blocks, so if you have £6 you an only redeem £5 etc... the difference with this chain compared to the first is that you can gather points from many different affiliated sources... not just the Supermarket , so even buying Airline tickets with certain airlines, or paying utility bills, even Ebay will gain you Nectar points... which you can use to either spend in store or on air miles or so many other things
Here's the website of the second chain Sainsbury to give you an idea of how it works..
https://www.about.sainsburys.co.uk/...ices/nectar/nectar-frequently-asked-questions