I don't know about SNK, but I just got a VB eyeliner at Selfridges with the 20% off (free collection to store, so ordered from Self instead of directly), so there is a good chance other stores will too!
Btw with Selfridges, the discount didn't show on the website, but did once I was logged in, and added to bag.
Edit: ha, posted at the same time 😅