Can you use a 30 pound gift card again if you don't spend it all?

Yes, you can typically use a gift card multiple times until the balance is fully spent, as long as the card has not expired and there are no restrictions from the issuer. If you have a £30 gift card and only spend part of it, the remaining balance will remain available for future purchases. However, it's important to check the specific terms and conditions of the gift card, as they can vary by retailer.