From our It's-Not-New-But-We-Still-Love-It file: Yves Saint Laurent's Touche Eclat, otherwise known as Radiant Touch. Just like a certain much-advertised wood varnish, this cosmetic accessory does what it says on the tin. Touche Eclat is both a concealer and highlighter, playing down dark circles and fine lines while simultaneously reflecting light. All this in one little wand - no wonder it is one of the company's best-sellers. Priced at £19.50 for 2.5 ml, you'll find Touche Eclat at all YSL stockists (if supplies haven't already run out).