I went into Cavendish House at the weekend (assume rest of House of Fraser group is running the same promotion).
With any 2 purchases of Lancome products you get a choice of 7 - 7! -out of 20 free gifts. There is a choice of some really lovely stuff, 4 different types of face cream, a couple of serums, a choice of 2 eyeshadow quads, mascara, perfume, mini juicy tubes and others I can't remember. Plus a make up bag.
It's a really good offer. It felt like Christmas opening all the goodies.