NYX Can't Stop Won't Stop Foundation (Multiple Shades) – from £1.13 @ Amazon

NYX's cult Can't Stop Won't Stop foundation is a proper full-coverage liquid with a comfy matte finish that genuinely lasts — waterproof, non-comedogenic and fully vegan. Loads of shades are heavily discounted on Amazon right now, with clearance colours from just over £1 and popular tones around £7–8 instead of the usual £15–16. Brilliant if you want a reliable everyday foundation without paying Boots prices, and worth grabbing a backup shade while the clearance is on.