Glossybox UK Halloween Sale: Get 20% Off On All Subscriptions! Last updated by Hello Subscription on October 1, 2018. Subscription Box Coupons & Deals / Glossybox UK Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification Glossybox UK is having a Halloween Sale! Get 20% off on all GLOSSYBOX subscription when you use the coupon code HALLOWEEN. Valid until 10/31! Are you getting a Glossybox UK today?