Is she really 40? Well I will say she looks fantastic & if she has had any "work" it certainly is not obvious; (like some of these pouting, stiff-faced celeb's of a certain age).
I don't think her being the face of M&S would put me off if it was body creams & make-up she was advertising as lbh her skin, hair & body are lovely.
I'm not too keen on her dress sense & style though but each to their own I guess.