Instructions:£15 off is subject to a minimum order value of £30 and excludes cloverleaf items. Your £15 discount is valid against your first order of £30 or more and can be used only once. For £15 off your first order when you spend £30 or more please quote order code PM6385 at the checkout.
Not 100% sure, but cannot be used on "sale" items.
Think this is normal for most of these codes