By Stacey Dutton & Melisha Kaur & Lucy Addicott & Joanna Kania & Jada Jones & Harriet Morphy-Morris & Bethan Shufflebotham & Eve Rowlands Us beauty buffs need no convincing to treat ourselves to a brand new face cream, blush stick or SPF. So, when the bank holiday – and an extra day at the weekend – looms and cosmetic brand Lookfantastic slashes the prices of some of its best-selling items by up to 40%, it’d be rude for us not to take full advantage of this additional treat and indulge in a bit of retail therapy – especially with payday having just been. With viral TikTok products like the May…