Heliocare 360° Mineral Tolerance Fluid (£31) is a personal favourite of mine. The light fluid formula works incredibly well underneath my makeup, and although it has a slight white hue to begin with, it does dry down sheer. It's one of the few sunscreens that doesn't cause my rosacea-prone skin to have a reaction and one I continually come back to. Bonus points because it's water-resistant.