Is the well known loyalty card in UK as a Nector or Nectar card?

The well-known loyalty card in the UK is Nectar, not Nector. Nectar is a popular loyalty card scheme operated by Sainsbury's, one of the largest supermarket chains in the UK. It allows customers to earn points when they shop at Sainsbury's or other participating retailers and redeem those points for discounts, vouchers, or rewards.