You will be able to redeem your first discount when you have collected 20 hearts. Every 20 hearts you will be able to redeem £1 off an order. You can decide to wait before redeeming your £1 off and accumulate hearts to get a greater discount.
To turn points into a reward, you will need to log into your account on the Caroline Gardner website, then click on the launcher to open the rewards panel.
Next, click on Ways to redeem.
If they do have enough points, there will be a Redeem button.
Upon clicking redeem, you will be taken to a page that shows the coupon code with a button to Apply code which will automatically apply that coupon code to the checkout.