UKLASH has gone viral several times for its bestselling eyelash growth serum, and it’s currently 30% off. I put some of the brand’s bestselling products to the test, including gift sets that will make the perfect stocking fillers. UKLash Lash Growth Serum, £26.60 (was £38) Every influencer seems to have UKLash’s Eyelash Serum in their…