Great question! You can use all your shopping credits on the same order, as long as you meet the spend criteria. For every £1,000 you spend (excluding delivery), one £50 credit will be automatically applied at checkout.
You can also reach the spend total over multiple orders, as long as it’s within the 6-month validity period. Just keep in mind that once a credit is applied, the spend resets—so you’ll need to spend another £1,000 to unlock the next credit.