Here's how to use Promo Codes when shopping at Lash Base: You need to log in to your existing account at lashbase.co.uk or create a new account of your own; then, to select a product, you can browse the lashbase.co.uk product page to select a product and add it to your cart. Occasionally, they will offer you discounted products up to 55%. Then check out, click order, select the eligible Coupon Codes, and finally complete the payment. Plus, here's lashbase.co.uk's latest sale on October: Get Up To 50% Off Rakuten | Click Here.